Answer:
Phanerozoic Eon is divided into three eras on the basis of prevailing climatic conditions on earth and dominant life forms present during the time.
Explanation:
The Phanerozoic Eon is divided into three eras namely the Paleozoic, the Mesozoic, and the Cenozoic era. The basis for classification of the Phanerozoic eon into three eras are the prevailing climatic conditions on earth and dominant life forms present during the time. Changes in climatic conditions of earth altered the species composition and dominant life forms present in each era.
Answer:
The eons are defined as the longest portion of the geological time scale, which records all the major distinct events that have taken place in the past. It's unit time is a billion years.
This eon is divided into 3 eras, namely-
(1) Paleozoic Era
(2) Mesozoic Era
(3) Cenozoic era
These eras are distinctly divided on the basis of the first appearance and disappearance of life forms on earth, which has been studied and determined through the study of the fossil assemblages that have been obtained. In addition to this, they are also classified based on the climatic variation that has favored the growth and expansion of different life forms that have occurred on earth in the geological past.
how is a species identified by name?
A. A one part name with the genus
B. a one part name with the species name
C. a two part name with the genus and the species name
D. a two part name with the species names and the genus
Answer:
A two part name with the genus and species name.
Explanation:
the first part is the genus that it belongs to, the second half is the species :) cheers.
Answer:
A two part name with the genus and species name.
Explanation:
:>
What is the function of DNA and where is it found in a eukaryote cell?
A) sexual reproduction:ribosomes
B) controls respiration:mitochondria
C) regulates all cell activity:nucleus
D) pass of like traits:endoplasmic reticulum
Answer:
C. Regulates all cell activities.. And it is found in nucleus.
Answer:
C) regulates all cell activity:nucleus
Explanation:
regulates all cell activity:nucleus
DNA is used for asexual and sexual reproduction; it is the blueprint for traits passed from one organism to another. It controls ALL cell activity by producing the blueprint for proteins. Proteins form enzymes, which regulate cell processes. DNA is found in the nucleus of any eukaryote cell. In prokaryotes, or bacteria, the DNA is in the cytoplasm.
Planetary geologists used meteorite dating and lunar rocks to determine that
A. the solar system is 4.6 billion years old
B. comets likely exist beyond the orbit of Pluto
C. meteoroids originate from interplanetary debris that was gravitationally swept up by planets
D. asteroids are fragments of a broken planet that once orbited between Mars and Jupiter
Answer:
The answer is A
Explanation:
Meteorite dating and lunar rocks are being used by planetary geologists in order to determine that the age of the solar system which is 4.6 billion years old. These meteorites are being tested in order to determine their span of existence
Answer:
Option (A)
The meteorites are the rocks from the outer space, that must have entered the earth's atmosphere in the geological past, causing a mass extinction event or asteroidal impacts. It may also have formed on earth during the time of the formation of earth. These rocks are very important to the planetary scientists as it helped in estimating the approximate age of the solar system. By using the radioactive dating method, it has been found that the minimum age of our solar system is approximate 4.6 billion years old. The composition of these meteorite and rocks are also studied and it was demarcated that they have originated from the asteroid belt that is present between the planets Mars and Jupiter.
Thus, the correct answer is option (A).
Jack leaves his house and walks north for 30m. He turns left and walks west for 30m. He then turns left again and walks another 30m. What is the point of reference for Jack’s motion?
Answer:
Jack's house
Explanation:
Point of reference is a point in a space that can be used to tell where other things are positioned. It is also known as the reference point. A simple way to put this is the starting point. As you can see in your example, Jack started from his home and is moving in directions depending on his house's location.
Drag the tiles to the correct boxes to complete the pairs.
Match each nutrient to it’s primary function in the body.
-carbohydrates
-proteins
-fats
-vitamins
1.acts as antioxidants
2.provide a quick source of energy for cells and tissues
3.form tissues, growth factors,and hormones
4.form structural components of the cell membrane
Carbohydrates is 2
Proteins is 4
Fats is 3
Vitamins is 1
Answer:
- Carbohydrates is provide a quick source of energy for cell and tissue.
- Proteins is form tissue, growth factors and hormones
- Fats is form structural components of the cell membrane
- Vitamins is acts as antioxidants
How are participants assembled for a clinical trial?
A. patients volunteer because they have a specific disease
B. individuals are randomly exposed to a dangerous virus
C. Human subjects are given an unnecessary medical treatment.
D. healthy people are infected with a deadly pathogen
Answer:
I would say the best answer for this question would be A.
Explanation:
I chose this answer because factually, it does check out. Say, for example there is a clinical trial for a drug to treat a specific disease.
I can rule out B because obviously these doctors would not purposely infect the volunteer with this disease just to take a shot at curing them.
I ruled out C because if we were using this trial drug on a completely healthy person... how would we know that the drug can help/cure the disease in mind if the person never had the disease in the first place. C is simply absurd.
And finally, D is much like B and so I can rule it out as well for the same reason.
Answer: patients volunteer because they have a specific disease
Explanation:
Which of these terms best describes a developing country? Select two
Answer:
Low consumption rate and Lack of access to vaccines are correct.
Explanation:
A developing country is a country which has low development and it lacks behind economically from other countries. The developing country also has low rate of industrialization as compared to other developed countries.
Answer:
lack of pharmacies
poor sanatation
low consumption rate
Explanation:
Which of the following is the route by which water is transferred from cell to cell in the root section? A. apoplastic pathway b. transmembrane pathway c. symplastic pathway
Symplastic Pathway is the route by which water is transferred from cell to cell in the root section.
Option C
Explanation:
This is cellular path that takes the water from one cell to other cell using the connections which is inter cellular path relationship. These intercellular connections are called as the plasmodesmata. plasmodesmata are the membrane connections between the adjacent cells. Whenever the water molecules are crossing through the cortex and it then tends to cross the endodermis. Endodermis is the internal structure of the plant where the water molecules get diffuses freely.
Scientists believe the first giraffes on Earth had shorter legs and a shorter neck than giraffes today. What can you conclude about these first giraffes?
Answer: Survival of the fittest
Explanation: There where not many trees in the plains and with so many Giraffes roaming around with little predators, food was hard to come by. As the lower branches started thinning out, only the taller giraffes could reach the higher branches. When there was no food left, the shorter Giraffes started to die off, leaving only the taller giraffes. This is known as Survival of the Fittest because only Giraffes with the taller gene where able to survove. The shorter gene is extinct now becasue they no longer had food to live off of.
Answer:
Usattestpred Answer:
They had food sources that were low to the ground
Explanation:
I did it?? I got 100 percent..
5 characteristics of seaweeds
1. Seaweeds, also known as macroalgae, comprise a diverse group of organisms representing various growth forms.
2. Seaweed comes in 3 colors green, brown, and red ( but colors within these groups vary)
3. seaweeds lack the complex reproductive structure found in sea grass and land plants
4. Most seaweed attaches to hard surfaces such as rocks, shells or other algae, using a specialized basal structure called a holdfast; however, a few seaweed species survive over mud or sandy bottoms.
5. Seaweed is autotrophic, which means it produces its own food; using sunlight, macroalgae convert carbon dioxide and water into oxygen and sugar (photosynthesis).
I hope this helps you.
Seaweeds are multicellular organisms that can be green, red, or brown depending on their photosynthetic pigments. They lack true tissues or organs found in land plants and instead have leaf-like blades, stalks, and structures called holdfasts for attachment. Seaweeds are capable of photosynthesis and can be found in diverse habitats.
Explanation:Seaweeds, also known as algae, carry distinct traits that differentiate them from terrestrial plants. Here are five characteristics:
Multicellular Structure: Seaweeds are multicellular as implied in the instance of brown algae (Phaeophyta).Colouration: Their color can be either green, red, or brown, determined by their photosynthetic pigments.Lack of True Tissues or Organs: Unlike land plants, seaweeds do not have true tissues or organs such as leaves, stems, or roots. They have leaf-like blades, stalks, and structures called holdfasts for attachment.Photosynthetic: Seaweeds have multiple photosynthetic pigments (chlorophyll a, chlorophyll c, B-carotene, and fucoxanthine), which enable them to perform photosynthesis.Diverse Habitat: Seaweeds thrive in a variety of habitats including seawater, brackish water, and even snow patches.Learn more about the Characteristics of Seaweeds here:https://brainly.com/question/33442998
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infer weather balanced forces must be acting on a car moving at a constant speed
i Know this question is really last min but i need it by 5 min
Answer:
The direction of motion is changing, so the car is accelerating. By Newton's second law, an unbalanced force must be acting on the car if it is accelerating.
Robert Goddard contributed to astronomy by
A-walking on the moon
B-designing liquid propulsion system
C-developing theories of gravity and motion
D-using math to predict the existence of Neptune
Your answer is going to be letter B
Jane is observing a cell under an electron microscope. She identifies an organelle having an outer and an inner membrane. She also notices that the outer membrane is smooth while the inner one is highly folded. Which organelle is Jane observing?
A.
Mitochondria
B.
Golgi bodies
C.
Nucleus
The correct option is
Mitochondria is one of the organelles that are found in living cells and it is the one responsible for the production of ATP, which is the source of energy that is usable by the cells. Mitochondria is designed in such a way that, it will be able to carry out its functions efficiently. Mitochondrial has two membranes, one at the outside and the other one at the inside. While the outer membrane is smooth, the inner one is highly folded and it formed a structure called cristae. The folding of the inner membrane serves to increase the surface area inside the mitochondria.
Answer:
The correct answer in A. Mitochondria
Explanation:
I got it right on Edmentum
13. What makes water a polar molecule?
bişey anladıysam arap olayım he :D tmm ben sana cevap veririm.
Burada türk olan var mı
Acep :
Söyleyin bana bu site eodev gibi mi yav .
Bişey anladıysam gene arap olayım haha.
İyi dersler canım..
This phylogenic tree shows the changes in bacterial species from the ancestral species to the most current split in the modern classification system. This tree supports the theory that
A) speciation results in biodiversity.
B) natural selection favors the fittest.
C) within a population, variation exists.
D) extinction is the fate of the species that cannot adapt.
Answer:
a
Explanation:
usa test prep
Answer:
Your correct answer is A) speciation results in biodiversity.
Explanation:
How do adult stem cells differ from embryonic stem cells?
A. Adult stem cells have high healing potential, and embryonic stem cells have low healing potential.
B. Adult stem cells can only be used by adults, and embryonic stem cells can only be used by babies.
C. Adult stem cells have unipotency, and embryonic stem cells have pluripotency.
D. Adult stem cells have totipotency, and embryonic stem cells have multipotency.
Answer:
C
Explanation:
Adult stem cells can only differentiate to form a single type of cell.
Embryonic stem cell are pluripotent as they can differentiate into any cell types except extra embryonic membranes like placenta.
Only zygotic stem cells are totipotent
Adult stem cells differ from embryonic stem cells as Adult stem cells have unipotency, and embryonic stem cells have pluripotency.
Difference between Unipotency and Pluripotency:Unipotency: A unipotent cell is that one stem cell that has the capacity to differentiate into one cell type only.
Pluripotency: pluripotent cell that has the potential to differentiate into any cell of the three germ layers i.e endoderm ( stomach lining, gastrointestinal tract, the lungs etc), mesoderm (muscle, bone, blood, urogenital etc), or ectoderm (epidermal tissues and nervous system etc), but not into cells of extra-embryonic tissues like the placenta.
Adult Stem Cells are unipotent that is they can develop only one type of cell but Embryonic Stem Cells are pluripotent, Hence, can develop into any cell type.
therefore option c is correct.
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Define transpiration:
Answer:
the exhalation of water vapor through the stomata.
How are meiosis and mitosis similar
Mitosis and meiosis are similar in that they are both forms of cellular reproduction, and they both, consequently, produce daughter cells. Both processes also use the same four steps: prophase, metaphase, anaphase and telophase.
Answer:
Both the process of mitosis and meiosis are types of cell division which occur in different types of cell in body but they posses some similarities like:
1. Both types of process follow the same process like DNA replication and condensation, chromosomal segregation, spindle formation.
2. Same mechanism for segregation of chromosomes like microtubules, centrosomes and motor proteins.
3. Both have same stages like interphase, prophase, metaphase, anaphase and telophase.
Why does the moon appear to shine its own light?
--
A. The moon glows from inside its interior.
B. The moon reflects light from Earth.
C. The moon's atmosphere reflects solar radiation.
D. The moon's surface reflects sunlight.
The answer is D. The moon’s surface reflects sunlight.
The moon appear to shine its own light because the moon's surface reflects sunlight which is in option D as moon does not emit its own light like a star. Instead, it appears to shine because it reflects sunlight.
The intensity of the moon's reflected light can vary depending on factors such as the moon's position in its orbit and the angle at which sunlight hits its surface. This is why the moon appears to change in brightness throughout its lunar cycle, which we observe as the different phases of the moon. It's important to note that the moon's atmosphere is extremely thin compared to Earth's atmosphere, and it does not have the ability to scatter or reflect sunlight in the same way Earth's atmosphere does.
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what would happen to the population of an animal if its food source were removed from the food web
it would increase
it would decrease
it would stay the same
it would fluctuate
it would probably decrease
Answer:
Its population decreases.
Explanation:
a couple is about to have a baby, the father is heterozygous for eye color and the mother is homozygous recessive for eye color. what is the probability the baby will have brown eyes (B=brown b=blue)
According to the information, the probability of the baby that will have brown eyes is found to be 75%.
What is the reference to having brown eyes?The reference to having brown eyes is determined by the fact that Eye color is directly related to the amount of melanin in the front layers of the iris.
People with brown eyes have a large amount of melanin in the iris, while people with blue eyes have much less of this pigment. A particular region on chromosome 15 plays a major role in eye color.
According to the context of this question, brown eyes (B) are dominant over blue eyes (b). Due to this, the genotype of the father is Bb while the genotype of the mother is bb. When they are crossed, they produce offspring with the genotypes Bb, Bb, Bb, and bb. This means that 75% of the offspring possess brown eyes.
Therefore, according to the information, the probability of the baby that will have brown eyes is found to be 75%.
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osmosis involves which of the following processes
Answer:
Movement of water from it higher potential to its lower potential.
Answer:
Osmosis is the chemical process.
Explanation:
Osmosis is the chemical process, where the solution moves from higher concentration to lower concentration through a semipermeable membrane. Osmosis may be slow or reversed, where the movement of solution is occured against the concentration gradient, from lower to higher concentration. Osmosis is similar to diffusion. Diffusion follows the same process as in osmosis without semipermeable membrane.
There are three types of osmotic solution:
Isotonic = Water moves in and out of the cell at an equal rate.
Hypotonic = Water moves into the, making it swell.
Hypertonic = Water moves out from the cell, like a raisin.
Why are viroids not considered to be a type of virus?
A. They use RNA as genetic material.
B. They only infect plants.
C. They do not cause disease.
D. They do not have a protein coat.
Answer:
d they do not produce a protein
Explanation:
Which of the following processes is decreased when many trees are removed from an area?
Answer:
Option (C)
Explanation:
When many trees are removed from any area, the area becomes dry and gets adversely affected. Due to the lesser amount of trees, the area will evaporate more due to its dry and increasing temperature, as a result of which there will be more precipitation. This precipitation will lead to more amount of surface runoff over the area. So the transpiration will simultaneously decrease as the plants will not be able to absorb water by its roots, that regulates the overall temperature of the plant and protects it from dying.
Thus, the transpiration process is directly proportional to the number of plants and trees in any area.
Thus, the correct answer is option (C).
What is the similarity between a fjord and a gully? help pls ;-;
Both are formed by glaciers.
Both are formed by rivers and streams.
They are examples of erosion by water in different forms.
They are examples of erosion and deposition by strong winds.
Answer:
They are examples of erosion by water in different forms
Explanation:
The similarity between a fjord and a gully is: They are examples of erosion by water in different forms. Option C
What is the similarityBoth fjords and gullies are landforms shaped by the erosional forces of water, but they are created in different geographical settings and by different processes.
Fjords are typically found in glaciated areas and are formed by glacial erosion, while gullies can be found in various landscapes and are formed by the erosional action of rivers and streams.
Therefore we conclude that these two environmental phenomena are erosion types that occur in the surrounding we live in
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Which of the following is formed during the light-independent reaction of photosynthesis?
ATP
Carbon dioxide
Glucose
Water
Answer:
Glucose is formed during the light-independent reaction of photosynthesis.
Explanation:
Photosynthesis is divided into two reactions. The light dependent reaction and light independent reaction. The light independent photosynthesis is also called Calvin cycle. Calvin cycle use the ATP and other products of light dependent photosynthesis to produce glucose. Calvin cycle is also called dark reaction and takes place in the Stroma of chloroplast.
Answer: I believe the answer is C) Glucose!!!!!!!!!!
Humid tropical climate regions are located
Answer:
the answer is A
Explanation:
Answer:
A
Explanation:
Choose the word that best represents homeostasis. A. Movement B. Equilibrium C. Unbalanced D. Synthesis
The correct answer is B. Equilibrium :))))
Answer: B. Equilibrium
Explanation:
Homeostasis is the tendency of the body to maintain a state of equilibrium. In this the body maintain the internal condition of the body constant and stable although the changes occurring in the external environment are not favorable. These include maintainance of the blood pressure, temperature, pH and other features that maintains the stability of the body and increases the chances of survival.
The wind stirs up ___ currents.
A. Cold-water
B. Warm-water
C. Deep
D. Surface
Answer:
the answer is Surface
Explanation:
Wind creates surface currents by dragging a layer of water when it passes over the water’s surface. This differs from deep ocean currents which are mainly driven by temperature and salinity differences.
Explanation:Surface currents are oceanic currents that occur at or near the surface of the ocean, and they are primarily driven by the wind. These currents are responsible for moving large amounts of water horizontally across the ocean's surface. Wind interacts with the surface of the ocean, creating friction and causing the water to move in the same direction as the wind.
When the wind blows across the surface of the ocean, it imparts its energy to the water, generating these surface currents. The direction and strength of surface currents depend on factors such as wind speed, wind duration, and the geography of the ocean. These currents can have a significant impact on various aspects of the marine environment, including climate, marine life, and navigation.
So, in the sentence "The wind stirs up surface currents," the word "surface" indicates that the wind's action primarily affects the currents near the surface of the ocean.
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The stem is responsible for providing support to the plant. A is a type of stem that grows underground. It is capable of asexual reproduction and food.
Answer:
Rhizome
Explanation:
Rhizomes are stems that are grown underground
Capable of asexual reproduction (producing an organism identical to the parent)
also produces food (many used in cooking like tumeric and ginger)
Answer:
The correct answers for Plato are 1)B. Rhizome and 2)A. Storing (: