Answer:
A
Explanation:
Fossil fuels were formed millions of years ago and are generally considered to be non-renewable because of the extreme amount of time it would take to renew them. They are the remains of fossilized plants and animals (hydrocarbons are in crude oil).
The statement that is false about fossil fuels is:
A) most of them formed thousands of years ago, and will take hundreds of thousands of years to renew.
What are Fossil fuels?Fossils are the remains or traces of ancient life that have been preserved by natural processes, from spectacular skeletons to tiny sea shells. Fossil fuels were formed millions of years ago and are generally considered to be non-renewable because of the extreme amount of time it would take to renew them. They are the remains of fossilized plants and animals (hydrocarbons are in crude oil).Fossil fuels include coal, petroleum, natural gas, and heavy oils. All contain carbon and were formed as a result of geologic processes acting on the remains of organic matter.
A) most of them formed thousands of years ago, and will take hundreds of thousands of years to renew.
Thus, the statement that is false about fossil fuels is A, i.e.
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The given question is incomplete:
The complete question is:
Which of the following statements about fossil fuels is false?
A) most of them formed thousands of years ago, and will take hundreds of thousands of years to renew.
B) they are the fossilized remains of ancient hydrocarbons, fixed by photosynthetic organisms, and then buried under sediment and transformed by pressure and heat.
C) they formed millions of years ago, and if renewal were possible, the process would take tens or hundreds of millions of years
D) A and B
E) B and C
Which statements describe the fossil record? Check all that apply.
There is very little fossil evidence for the first 4 billion years of Earth.
There is very little fossil evidence for the last 600 million years of Earth.
Most of the fossil evidence is from the first 4 billion years of Earth.
Most of the fossil evidence is from the last 600 million years of Earth.
The fossil record is complete.
The fossil record is not complete.
Statements that gave description as regards fossils records in the question are;
There is very little fossil evidence for the first 4 billion years of Earth.The fossil record is complete.Fossil record can be regarded as documented records which is dine through help of by fossils.
These fossils comes from the remains of organisms as well as imprints of organisms which is been preserved in sedimentary rock as far as earlier geological periods.
For the first 4 billion years of Earth, the records of Fossil evidence is very little, but as time goes on, there are alot of evidence discovered, and the totality is known as Fossil records.
This records helps to get the record of the occurrence of living organism as well as its evolution, geological time as inferred from fossils.
Some of Examples are:exoskeletonsbonesobjects preserved in amber hairshells stone imprints of animalsThe totality of fossils is known as the fossil record
Therefore, Fossil records helps in explanation of evolution of living organisms
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The correct options are (A), (D), and (F). The statements that describe the fossil record accurately are There is very little fossil evidence for the first 4 billion years of Earth, Most of the fossil evidence is from the last 600 million years of Earth and The fossil record is not complete.
Let's evaluate each statement about the fossil record:
A) There is very little fossil evidence for the first 4 billion years of Earth.
True Fossil evidence is sparse for the first 4 billion years of Earth's history, primarily because early life forms were mostly microscopic and not easily preserved. Fossils from this period are rare and mostly consist of simple organisms like bacteria.B) There is very little fossil evidence for the last 600 million years of Earth.
FalseThere is actually a considerable amount of fossil evidence for the last 600 million years, especially since this period includes the Cambrian Explosion, a time of rapid diversification of life forms, and the development of complex organisms.C) Most of the fossil evidence is from the first 4 billion years of Earth.
FalseMost of the fossil evidence comes from the last 600 million years, especially since more complex and larger organisms became prevalent and more likely to be preserved as fossils.D) Most of the fossil evidence is from the last 600 million years of Earth.
TrueMost of the fossil record, particularly detailed and diverse fossils, comes from the last 600 million years, which includes the Cambrian period to the present. This period features a wealth of preserved life forms and a greater diversity of fossils.E) The fossil record is complete.
FalseThe fossil record is not complete. Many factors, such as geological processes and the nature of fossilization, result in gaps in the record. Not all organisms are equally likely to be preserved as fossils.F) The fossil record is not complete.
TrueThe fossil record is indeed incomplete. Many organisms did not fossilize, and geological processes can destroy fossils, leaving gaps in our understanding of the history of life.The complete question is:
Which statements describe the fossil record? Check all that apply.
A) There is very little fossil evidence for the first 4 billion years of Earth.
B) There is very little fossil evidence for the last 600 million years of Earth.
C) Most of the fossil evidence is from the first 4 billion years of Earth.
D) Most of the fossil evidence is from the last 600 million years of Earth.
E) The fossil record is complete.
F) The fossil record is not complete.
Is it true that all cells have the same genes, but different genes are active in different cells?
Answer:
Is it true that all cells have the same genes, but different genes are active in different cells.
No, all cells are made up of a gene which is inherited from the parents cell. The gene is located in the DNA which is found in the nucleus of every living cell
Explanation:
What might happen to an organism that uses asexual reproduction if the average temperature of its habitat changes?
A. The organisms will not grow as large as before the temperature change.
B. The organism will change to adapt to its environment.
C. The species may become extinct because it cannot adapt to change.
D. More of the organisms will survive to adulthood.
(These are multiple choice questions btw)
C
Asexual production, such as in budding, creates exact copies as the parent cell and hence there is little variability between the parent and offspring. While asexual reproduction offers the advantage of fast reproduction it also bears a great disadvantage.
Explanation:
Natural selection acts on variability to help a population adapt to change in an environment. During a change in environment, the organisms with genes better adapted to the new environment become more favorable to pass their genes. Therefore the population evolves over time to have more of these alleles in the population. A population with low variability becomes less able to adapt to changes in the environment.
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A cell that is undergoing mitosis is examined with a light microscope. An observation that would allow for identification of the cell as an animal cell rather than a plant cell would be
Question 10 options:
the centrioles migrating.
the chromosome pairs separating from each other.
the chromosomes twisting about each other.
the nucleoli disappearing.
Answer:
An observation that would allow for identification of the cell as an animal cell rather than a plant cell would be the centrioles migrating.
Explanation:
Centrioles start moving in the direction of opposite ends of the cell, whereas the microtubules starts moving from the centrioles and gets attached to the centromeres of chromosomes. the microtubules that have been projecting from the centrioles on opposite poles of the cell are connected to individual centromere and further form into spindle fibers. After the accumulation of chromatin into chromosomes in prophase, resulting in the breaking apart of the membrane or nuclear envelope. In case of animal cells, the centrioles present at the nucleus starts to separate and go to the opposite poles of the cell. As the centrioles transfer, a spindle is seen to be formed between them.
A segment of a DNA strand is GTC TAG. Which of
strand is GTC TAG. Which of the following is the complementary DNA
strand?
GTC TAG
GUC UTG
CAG AUC
CAG ATC
Answer:
CAG ATC
Explanation:
DNA is the genetic material of most living cells. A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits (Adenine, Guanine, Cytosine and Thymine). Each of these chains is known as the DNA strand making the DNA molecule double-stranded. Hydrogen bonds between the bases of the nucleotide hold the two chains together.
An hydrogen bond holds two nucleotides together using the COMPLEMENTARY BASE PAIRING RULE, which states that Adenine base (A) will always hydrogen bond to Thymine base (T) while Guanine base (G) will always hydrogen bond to Cytosine base (C) in a DNA molecule. This is responsible for the double-helical structure of the DNA. Based on this principle, a DNA molecule with sequence: GTC TAG will have a complementary strand with sequence: CAG ATC.
Which molecule activates light reactions? ATP, chlorophyll, water, NADPH
Answer:
chlorophyll
Explanation:
In the 1600s, advances in microscopy led to the developm
vances in microscopy led to the development of cell theory) Which of the following statements is part of the
ll theory?
A.All cells require water and oxygen to survive.
B. All living things are made of one or more cells.
C.All cells have organelles with specialized functions.
D.All living things rely on several different types of cells.
2. In order to function, all living things require which of the following?
A cells
B. nuclei
c. organs
D tissues
3.The 1830s Theodor Schwann showed that the mature tissues of animals were traceable to embryonic cells. Which of the
wing statements of cell theory does this provide evidence for?
A) All living things are made from cells.
B. Cells are the basic units of structure and function in an organism.
3. All cells come from preexisting cells.
D.Each cell has a specific design and purpose.
Answer:
Hello! The answers are:
B. All living things are made of one or more cells.A. cellsC. All cells come from preexisting cells.Explanation:
All of the statements in the questions are features of the cell theory.
Cell Theory:
The cell theory, proposed by scientists Theodor Schwann, Matthias Schleiden, and Rudolph Virchow, is the basic principle of biology. The cell theory contains three features or clauses that explain the basic structure and function of life. The cell theory postulates the following:
All living things, either unicellular or multi-cellular, are composed of cells.All cells originate from pre-existing cells, not through spontaneous generation.The cell is the basic unit of life. This basically means that the cell governs all structural and functional processes of life.Which is a better conductor of heat: air or a copper wire? Why?
A) Air is a better conductor of heat because it is a mixture.
B) Copper is a better conductor of heat because it contains electrons.
C) Air conducts heat better because the molecules in a gas are further apart.
D) Copper wire conducts heat better because molecules in a solid are closer together.
Answer:
i think the answer is D
Explanation:
A better conductor of heat is copper wire, which conducts heat better because molecules in a solid are closer together, which is option D. Copper is a good conductor of heat because it has free electrons that can move throughout the metal and transfer thermal energy quickly.
What is copper?Copper is a better conductor of heat than air because of the way its atoms and molecules are arranged. In a solid like copper, the atoms are packed closely together, allowing heat energy to be transferred quickly through the material. In contrast, in a gas like air, the molecules are much further apart, and heat energy transfers more slowly as a result. This is why copper is often used in electrical wiring and in other applications where high conductivity is needed.
Hence, a better conductor of heat is copper wire, which conducts heat better because molecules in a solid are closer together, which is option D.
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What changes occurred in the surroundings of the species from Hyracotherium to Equus?
The changes that occurred in the surroundings of the species from Hyracotherium to Equus are young shoots of trees and shrubs to tough leaves of grasses and wooded swampy areas to plains.
Explanation:
Hyracotherium is the fossil horse which is extinct. It was small and had teeth that were adapted to browsing on young shoots of trees and shrubs. It was adapted to live in wooded swampy areas where more toes were an advantage.
Equus is the present day horse or the modern horse. It is much larger and has larger teeth that are adapted to grazing on the tough leaves of grasses. The single hoofed toes of the present day horse allow it to travel fast in the plains.
The changes that can be associated with surroundings of the species from Hyracotherium to Equus are the presence of young shoots of trees and shrubs.
What are Hyracotherium?
Hyracotherium serves as genus of lower Eocene perissodactylous mammals having the size of a fox having four-toed forelimbs.
They are among the earliest ancestors of the modern horse, however, changes occurred in the surroundings of the species from Hyracotherium to Equus is the tough leaves of grasses around it.
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Velocity (m/s)
5
8
9
10
11
12
6 7
Time (s)
3
) A dog was west of his home for a short time and returns home then runs past it in the other direction (east). The graph shows
his position as a function of time.
How long did the dog stop at his home before running again?
A)1 seconds
B)2 seconds
C)5 seconds
D)10 seconds
Answer:
Although the graph was missing, I managed to find it on another source. According to the given conditions, correct answer is option C. A dog stop at his home for 5 seconds.
Reason:
In the graph, The dog was west of his home then he came back, he stopped at his home then runs to other direction (East).
When the dog was running from west to home, his running speed or velocity was 1 m/s which was then decreased to 0 m/s after reaching home. Here (at home) the dog stopped for a while (5 seconds according to the graph), and his velocity was 0 m/s. Then, he started running again to other East direction with velocity -2 m/s (opposite direction).
See attached images for further description.
state in sequence four main steps of sexual reproduction and write two advantages of such reproduction
Answer:
Hello!
Sexual Reproduction has slightly different stages in plants and animals. Sexual reproduction in plants has the following steps:
PollinationGamete germinationFertilizationZygote FormationSexual reproduction in animals has the following steps:
Gamete formation Fertilization Zygote formation Zygote develops into embryoAdvantages:
The embryo develops in a protective environment i.e. the ovary in plants and uterus in animals. Sexual reproduction produces genetic variations in the offspring that aid survival and incur resistance to diseases.Explanation:
* Pre-fertilization stages include meiosis 1 and 2 that involve the formation of genetically different gametes.
* The stages, zygote formation and the development of the zygote into an embryo and later into an individual, are classed as post-fertilization stages.
Unspecialized human cells are called ____________.
Question 3 options:
cancer cells.
mitotic cells.
signal cells.
stem cells.
Answer:
D. Stem Cells
Explanation:
Stem cells are cells that are able to be developed into most other types of cells in order to repair and restore damage in the body. To do this, stem cells must be able to specialize into many other different cell types. This means that first the stem cells must be an unspecialized human cell to later become specialized.
In which area would you have the most difficulty breathing?
Answer:
The top of the mountain
Explanation:
The air is the thinnest at high altitudes, like the top of a mountain
Answer:
The top of the mountain
Explanation:
The top of the mountain is where the air is under the least pressure and, a lesser amount of oxygen is present, along with that, because in the picture, the top of the mountain would have the least amount of air pressure, said air (specifically oxygen) will have more difficulty making it through your lung's selectively permeable membranes, and making it's way around your body in your red blood cells.
Investigator Smith is convinced that he has found a gun used in two shootings. When compared under the microscope, the two bullets do not seem to match up. If Investigator Smith is correct, what could be a reason why the bullets don't match?
The bullets hit at different speeds.
The bullets were bought from different gun stores.
The bullets were fired one right after the other.
One bullet was fired several years after the other.
Answer:
D) One bullet was fired several years after the other.
Explanation:
Every gun barrel has rotating groves because gives to the bullet a spin movement in order to improve accuracy during its flight. This spiralling groves leave in the bullet some unique marks, that if you can fire another bullet from the same gun, under a microscope an investigator can match this groves. But time and the use on the gun can change the patron of this marks leading to the deterioration on the gun barrel, possibly take us to a missmatch on two bullets fired by the same gun.
Final answer:
The bullets don't match because they were fired from different guns, which create unique markings on the bullets.
Explanation:
Investigator Smith may have incorrectly concluded that the gun he found was used in the two shootings. One possible reason why the bullets don't match is that they were fired from different guns. Each gun leaves distinct markings on a bullet when it is fired, creating unique striations. If the bullets under the microscope do not show similar markings, it suggests they were not fired from the same gun.
Therefore, the correct answer is that the bullets were fired from different guns. This could be due to different guns having different barrel characteristics, wear and tear, manufacturing defects, or modifications.
It is important for a forensic investigator to analyze various factors, such as bullet markings and gun characteristics, to determine if a bullet was fired from a specific gun.
Compare the composition of the Inhaled and exhaled air ?
Help me please and thanks
Answer:
In the process of nitrogen fixation, the decomposers convert free nitrogen into ammonia so that it can be used again by the plants in the soil. So the answer is 'A'.
Explanation:
Nitrogen fixation is the process by which nitrogen is converted into other organic forms and then broken down again to carry out the cycle again.
All the organisms use a fixed form of nitrogen to produce amino acids. The cycle helps the plants by providing them with ammonium. Nitrogen Fixation is carried out by bacteria, decomposers etc. When the nitrogen is fixed and utilized, the decomposers help in breaking down proteins in the excreta and bodies of dead organisms, converting it back into ammonia for the plants to use. In short, they carry out the recycling process.
PLEASE ANSWER QUICK!!! Jonas drew a diagram to compare two kinds of evidence that support the theory of evolution. Which label belongs in the area marked Z? no longer used by species link two species to a common ancestor evidence of adaptations to similar environments part of comparative anatomy studies
The label that belongs in the area marked Z indicates evidence of adaptations to similar environments. Thus, the correct option for this question is C.
What is Evolution?Evolution may be defined as a type of biological process that involves changes in the proportions of biological types in a population over a specific period of time. It involves the descent with modification from preexisting species.
The term adaptation can be defined as the evolutionary strategies through which species face different environments. Different kinds of species may have identical types of adaptations in order to face the same environmental conditions.
Therefore, the label that belongs in the area marked Z indicates evidence of adaptations to similar environments. Thus, the correct option for this question is C.
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Answer:
The correct answer is (C) evidence of adaptations to similar environments.
Describe the first interaction that triggers signaling to begin in a target cell
Answer:
Explanation :At first, the activated receptor relates with G proteins molecules in the cell.
before the ultimate physiological effect of the ligand on the cell's behavior is produced Therefore, the cellular signaling starts as soon as the first messenger (the ligand) binds to its receptor.
Cell signaling is the fundamental process in which a piece of certain information is transferred from the cell surface to the cell's nucleus. The first process in the triggering of the target cell is its ability to bind to the specific ligand.
Cells communicate through chemical signals. These signals are generally proteins or other molecules produced by the sending cells. The molecule is then released in the extracellular matrix, where they float until reaching the target cell.
The target cell must possess a receptor to bind with the incoming signal molecule. The binding of receptors and signaling molecules alters the shape and initiates the series of chemical reactions in the cell. The ligands are usually the signaling molecules, which bind to specific receptors.
Therefore, the first interaction that triggers the signaling to begin target cell response is the binding of ligand to the specific receptor.
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Science help please
Answer: It would actually be C
Explanation: the mRNA stand for Messenger RNA. It's the type of RNA that carries protein-building. Hence... its C
Chlorenchyma and aerenchyma are modified ____________ (a) phloem (b) sclerenchyma (c) collenchyma (d) parenchyma
They are D) modified parenchyma
What happens to the amount of available energy in the pyramid as it moves up through the different levels? A) It increases. B) It decreases. C) It remains the same. D) It decreases, then increases. Elimin
Answer:
The correct option is B) It decreases
Explanation:
As we move up the trophic levels in an energy pyramid, the energy which is passed from one trophic level to other decreases. Only 10% of the energy is known to pass from one trophic level to another. Most of the energy is lost as heat or used by the organism.
For example, suppose a plant has 100 calories in it. It will pass only 10 calories to the animal ( primary consumer) which eats it. The primary consumer will only pass 1% energy to the secondary consumer which eats it. Hence, we see that to the amount of available energy decreases as we move up the trophic levels.
Many wants to increase the yield of herd garden. A friend suggest that she pinch of the tops of the plants as the grow by cutting off the apical meristem how should this increase yield?
Answer: Photosynthesis takes place in the chloroplast of green plant cells
Explanation:
Single-celled algae and multicellular plants
both perform photosynthesis.
Photosynthesis is the process by which both
types of organisms
A. make food.
B. get rid of wastes.
C. extract energy from food.
D. reproduce.
Answer:
The correct option is A) make food.
Explanation:
Photosynthesis can be described as a process by which organisms like plant and some algae make their own food. They use light energy from the sun to convert carbon dioxide and water into glucose and oxygen. Oxygen is the by- product of this reaction. Hence, option A is correct.
Other options are wrong because photosynthesis is not a process by which energy can be extracted from food or it is not a process by which excretion of waste occurs. Neither is it a process of reproduction.
The single-celled algae and multicellular plants A. make food. Therefore , A. make food is correct.
Photosynthesis is a vital biological process in which both single-celled algae and multicellular plants harness energy from sunlight to convert carbon dioxide and water into glucose.
This transformative process occurs in chloroplasts, where pigments such as chlorophyll capture light energy.
This captured energy facilitates the synthesis of carbohydrates, serving as the primary source of organic nutrients for these organisms.
During photosynthesis, light energy is converted into chemical energy, stored in the form of glucose.
This glucose not only serves as a direct energy source for the organisms but also acts as a foundational building block for other essential organic molecules.
By utilizing carbon dioxide and releasing oxygen as a byproduct, photosynthesis plays a crucial role in maintaining atmospheric balance.
While photosynthesis is indeed a process vital for generating sustenance, it is not directly involved in waste elimination, energy extraction from food, or reproduction.
The primary focus is on the synthesis of organic compounds to support the metabolic and growth needs of these organisms.
option A, "make food," accurately encapsulates the core function of photosynthesis for both single-celled algae and multicellular plants.
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How can an earthquake or landslide produce a tsunami
Answer:
Tsunamis are large, potentially deadly and destructive sea waves, most of which are formed as a result of submarine earthquakes.
Explanation:
Explain how gases in the
atmosphere can cause the
greenhouse effect and describe
one problem which it may cause
PLEASE HELP ME
Gases in the atmosphere, ie., carbon dioxide, nitrous oxide, and methane, trap the heat from water vapor the sun has evaporated. This can cause higher temperatures, and forms the greenhouse effect. A problem it causes is global warming, since those gasses are trapping the heat in the atmosphere, harming the ozone layer, causing more ultraviolet rays to go through, which is very harmful to humans.
Hope I helped :)
Explanation:
The greenhouse effect is a process that occurs when gases in Earth's atmosphere trap the Sun's heat. This process makes Earth much warmer than it would be without an atmosphere.This cause global warming
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#30
Refer the the graph below showing the absorption spectrum of chlorophyll a. Explain what the graph is showing
Answer: The graph shows that chlorophyll a absorbs light principally around 420-450 nm and 650-680nm wavelengths
Explanation: Chlorophyll a is a pigment found in plants that traps light energy for use in photosynthesis. Chlorophyll a absorbs light mostly in the blue and orange-red wavelengths. This is shown in the graph, where the peaks are around the 400nm and 600nm wavelengths, corresponding to blue and red in visible light.
This absorption means the pigment is 'excited' by this light, sending into a higher state if energy which provides energy for the reactions of photosynthesis.
Where do clouds form? Select three options.
A. at the ground
B. in the upper atmosphere
C. near the Earth’s surface
D. where the air has very low humidity
E. where the atmosphere contains few particles
B
By the upper atmosphere, it is meant the upper atmosphere of the troposphere – the lowest layer of the earth’s atmosphere where weather events occur.
Explanation:
Liquid water first evaporates from the earth’s surface, mostly due to heat energy from the sun. The water vapor cools as it rises into the upper troposphere. This is because the upper atmosphere is cooler. As the water vapor cools, it coalesces into water droplets. These droplets, for them to form a cloud, need seed-like particles – like dust suspended in the atmosphere– to coalescence on. This way, the droplets grow bigger and this is how clouds are formed.
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Answer:
B DE
Explanation:
There were no geologists alive when the Bright Angel shale layer formed. However, scientists have been able to determine that this rock formed near the shore of an ocean. What evidence could geologists use today to find out about this ancient rock layer?
Answer:
because people where not alive yet oontill cenoznic era
Explanation:
Answer: Scientists could examine rock that formed recently and compare it to Bright Angel Shale. If the recent rock forms near oceans, the Bright Angel Shale rocks may have too.
In pea plants, purple flowers are dominant over white flowers, which are recessive. Cross two homozygous dominant (PP) parents.
Final answer:
Crossing two homozygous dominant pea plants (PP) will result in 100% homozygous dominant offspring (PP) with purple flowers.
Explanation:
When two homozygous dominant (PP) pea plants with purple flowers are crossed, all of the offspring will also have purple flowers. This is because purple flowers are dominant over white flowers. As these pea plants are homozygous dominant, each parent will contribute a dominant P allele to their offspring, resulting in offspring with a PP genotype. Therefore, a Punnett square analysis for this cross is not required as the outcome will be 100% PP offspring with purple flowers.