The particles of the snow have kinetic energy, but being a solid, it has less kinetic energy than that of liquid water. So they move around in a place about its mean position.
Option C
Explanation:Igloos are the small homes made up of snow. It used to be homes for the people living in Arctic regions in past. Now some tribes still live in these igloos, or they are made by tourists for amusements.
Snow is basically precipitation of ice from clouds. Being the solid form of water, ice has molecules more compactly arranged in its crystal structure. Thus, the molecules cannot move here and there like in fluid. But having some kinetic energy, they have certain movements i.e vibrations around its mean position.
B. Organisms most "it" for their environment will survive and e
26. Which of the following was most similar to the first living things on Earth?
A. Bacteria
B. Fish
C. Dinosaurs
D. Sponges
Option A. Bacteria.
Explanation:It is presumed that, over millions of years of evolution, abiotic molecules evolved into the self-replicating molecules by means of natural selection. Cyanobacteria, or blue-green algae is a bacteria which was one of the oldest fossils found on earth. These microbes conduct photosynthesis: using sun light, water and carbon dioxide to produce carbohydrates and oxygen.Cynobacteria played a major role in forming oxygenated atmosphere. The first living things on the planet Earths was single-celled micro-organisms which lack a well defined cell nucleus were known as prokaryotes, and bacteria belongs to prokaryotes ans hence among given options bacteria matches the most for the first life form on earth.Result: Among the given choices bacteria was most similar to first living things on earth.
Water droplets sticking to spider webs is caused by the same property that caused a water droplet to stick to your finger in your lab. What property of water is responsible?
Question 15 options:
capillary action
surface tension
cohesion
adhesion
Answer:
Adhesion
Explanation:
Its just like Water drops on a pine needle or on anything else, Cohesion is when water is attracted to water. Therefor its Adhesion, because that's when water is attracted to other things or substances.
What is a gene?
A. A piece of DNA that controls a trait
B. A specific form of an allele
C. A Chromosome that determines gender
D. A group of chromosomes
Answer: A). A piece of DNA that controls a trait
Explanation: A gene is a functional unit of hereditary. A gene determines the characteristics of an offspring. Genes are said to be functional unit of hereditary because they are transferred from the parents to the offsprings.
A gene is a nucleotide sequence found on a chromosome which determines a trait in an individual.
Answer:
A.)
Explanation:
i NEED HELP ASAP with my science analysis questions !
Answer:
A. a = 25 N
B. b = 20 N
C. c = 5 Kg
D. d = 5 [tex]m/s^{2}[/tex]
E. e = 4 Kg
F. f = 25 [tex]m/s^{2}[/tex]
Explanation:
Second Law of Motion : It states that force is directly proportional to rate of change of momentum in the absence of any external unbalanced force .
Force is equal to product of mass and acceleration.
[tex]Force = mass\times acceleration[/tex]
[tex]F(N) = M(Kg)\times a(m/s^{s})[/tex]
A.
Use [tex]F = mass\times a[/tex], here m= 5.0 Kg and a = 5.0[tex]m/s^{2}[/tex]
[tex]F = 5.0\times 5.0[/tex]
F = 25 N
B.Use [tex]F = mass\times a[/tex], here m =2.0 Kg and a = 10[tex]m/s^{2}[/tex]
[tex]F = 2.0\times 10.0[/tex]
F = 20 N
C.
Use [tex]m =\frac{F}{a}[/tex] , here F = 10.0 N and a = 2.0[tex]m/s^{2}[/tex]
[tex]m =\frac{10}{5}[/tex]
m = 5 Kg
D.
Use [tex]a =\frac{F}{m}[/tex] , here F = 50.0 N and m = 10.0 Kg
[tex]a =\frac{50}{10}[/tex]
a = 5[tex]m/s^{2}[/tex]
E.
Use [tex]m =\frac{F}{a}[/tex] , here F = 100.0 N and a = 25[tex]m/s^{2}[/tex]
[tex]m =\frac{100}{25}[/tex]
m = 4 Kg
F.
Use [tex]a =\frac{F}{m}[/tex] , here F = 1000.0 N and m = 40.0 Kg
[tex]a =\frac{1000}{40}[/tex]
a = 25[tex]m/s^{2}[/tex]
which of the following farming practices use water most efficiently? select two
-tilling soil
-planting perennial crops
-using drip irrigation
-planting annual crops
-using sprinklers
Answer:
-tilling soil
-using drip irrigation
Explanation:
I’m taking AP Environmental Science and we learned that tilling soil reduces the amount of moisture lost. Drip irrigation also saves water by dripping water slowing to plants.
The farming practices that make use of the water most efficiently are tilling soil and using drip irrigation. Thus the option A and C are correct.
What are farming practices ?Farming practices refer to the use of farm inputs to make most of the land. Such as crop rotation method, reducing of the tillage, and use of est management.
Adopting of agroforestry. Other includes pastoral farming and shifting cultivation etc. The methods that can save most of the water source are tillage and the use of drip irrigation systems.
Find out more information about the farming practices.
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Microscopic analysis is the most reliable method of matching hair samples to a suspect. True False
Answer:
The answer is false.
Explanation:
Although very popular in crime novels and TV shows, microscopic hair analysis isn't as reliable as it may seem. It was widely used during 1950-s and 1960-s as the best test to match a hair sample with the suspect, but modern tests proved it to be wrong. Microscopic analysis can give some information about the hair sample such as origin (human, animal or synthetic fiber), color, pigment distribution... For example, if the hair sample found was brown, and the suspect was black-haired, we could claim that he was Innocent. But if the found hair was black, does that mean that we could be absolutely sure that the suspect is guilty? Of course not, microscopic analysis can not provide evidence for that claim. On the other hand, the best method for matching biological samples, at the present time, is DNA analysis.
Answer:
faulse
Explanation:
Which system is responsible for providing structure and support?
Answer:
it's the skeletal system
Explanation:
Answer:
Your skeletal system
Explanation:
Your bone are in this system and they help you stay upright.
Which statement describing the cells in a body system is correct?
Answer:
some cells in the system may be different from the other cells in the system but all cells are coordinated and work together
Explanation:
The initial structural and functional entity of an organism is called a cell. They are essential for survival as it acts as the core for various processes.
The correct statement about the cell is:
Some cells in the organism may vary from other cells in the body, but all cells are harmonized and operate together.
This can be explained as:
The organism is made up of many types of cells that differ in functions and processes.The cells in a system may differ in structure and function but together they work to attain the result. and accomplish the results.For example cells of the digestive system have various cells but function together to perform the process of digestion.Therefore, cells work coordinately to perform functions in the system.
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22. Why are nitrogenous bases so important?
Answer:A set of five nitrogenous bases is used in the construction of nucleotides, which in turn build up the nucleic acids like DNA and RNA. These bases are crucially important because the sequencing of them in DNA and RNA is the way information is stored.
Final answer:
Nitrogenous bases are essential because they form the genetic code in DNA and RNA, transmitting instructions for protein synthesis that govern the development and functioning of organisms.
Explanation:
Nitrogenous bases are crucial components of nucleotides, which are the building blocks of nucleic acids like DNA and RNA. These organic molecules contain carbon and nitrogen and are classified as bases due to their ability to bind an extra hydrogen ion, which reduces the hydrogen ion concentration, making their environment more basic. There are four nitrogenous bases in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T). In RNA, uracil (U) replaces thymine.
The sequence of nitrogenous bases in DNA and RNA is crucial because it dictates the genetic instructions used in the development, functioning, and reproduction of all known living organisms and many viruses. These instructions are transmitted through the sequences of the bases, adopting a code that directs the synthesis of proteins, which in turn play a crucial role in cellular structure and function.
write two examples and two characteristics of monocot and dicot plant
Answer:
MONOCOTS DICOTS
Embryo with single cotyledon Embryo with two cotyledons
Pollen with single furrow or pore Pollen with three furrows or pores
Flower parts in multiples of three Flower parts in multiples of four or five
Major leaf veins parallel Major leaf veins reticulated
Explanation:
Monocots include most of the bulbing plants and grains, such as agapanthus, asparagus, bamboo, bananas, corn, daffodils, garlic, ginger, grass, lilies, onions, orchids, rice, sugarcane, tulips, and wheat.
Answer:
Dicot plant examples China Rose and
Castor
Monocot examples Daffodils,Garlic,Lilies
Tigers living in warm climates have thinner coats of fur than tigers living in cool climates.This is a result of
When you have tigers which in warmer climates are observed to have thinner coats and in colder climates are observed to have thicker coats this shows us the mechanism of adaptation and natural selection in play. Because they have a warmer climate around them they can hae a thinner coat and vice versa.
Raju’s cousin has come to visit his city.He notices that the dustbins in Raju’s city are of two colors-blue and green.a.explain the reason to him.
Answer:
Different coloured dustbins are used in areas so that one waste type can be separated from another.
Mostly, a blue bin is used for materials which can be recycled. For instance, plastic which can be recycled can be placed in this bin. Papers, paints, can of drinks are to be thrown in the blue bins.
In the green bin, waste related to or produced from the living organisms has to be thrown. It is also known as wet waste. For example, tea, coffee, cotton, hair etc are to be thrown in the green bin.
Can someone tell how to do this?
Answer: See attachment
Explanation:
Temperature
As you increase the temperature, the rate of reaction increases. This is because particles move more quickly at a higher temperature, increasing their chances of colliding and engaging in a chemical reaction!
The reason it isn't a straight diagonal line is because a certain amount of energy is required before the reaction can begin (i.e. a minimum temperature). The peak represents the optimum condition for an enzyme to perform its functions in. However, if the reaction temperature is too high, the enzyme is denatured and destroyed, so the reaction rate drops.
pH
Enzymes tend to have an "optimum" pH at which they work best. At the optimum pH, the enzymes can successfully perform their functions, outside this range, their efficiency can drop, and at extremes could become denatured.
Radioactive decay occurs when atoms:
A. lose mass
B. join with atoms of another element
C. break down the form atoms of another element
D. are exposed to another element
Answer:
I think it's A
Explanation:
in snapdragons, flower color is controlled by incomplete dominance. The two difeles are red
(R) and white (W). The heterozygous genotype is expressed as pink.
a) What is the phenotype of a plant with the genotype RR?
b) What is the phenotype of a plant with the genotype WW?
c) What is the phenotype of a plant with the genotype RW?
4. A pink-flowerad nlantis
Answer:
(a) Red coloured flowers
(b) White coloured flowers
(c) Pink coloured flowers
The phenotype of a plant with genotype RR will be red colored flower, the phenotype of a plant with the genotype WW will be white colored flower, and the phenotype of a plant with the genotype RW will be pink colored flower.
What is Incomplete Dominance?Incomplete dominance is a type of gene interaction in which both the alleles of a gene at a particular locus are partially expressed in the organism, which results in an intermediate or different phenotype from the parent phenotype. Incomplete dominance is also known as partial dominance.
An example of incomplete dominance is the flower color in Mirabilis jalapa. In this plant, the red flower is the dominant character and the white flower is recessive character. However, when both the alleles are present in an offspring this results into intermediate phenotype due to partial dominance. The genotype of the snapdragon plant with RR corresponds to red colored flower, the genotype WW corresponds to white colored flower, whereas the genotype RW corresponds to pink colored flower.
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_______ are organisms that recycle nutrients from decaying organic material.
Answer:
Decomposers
Explanation:
Decomposers decompose organic material, effectively recycling it.
What is the inner layer of the earth
Answer:
Earth (From order to crust to inner core)
Crust
Mantle
Outer Core
Inner Core <----Most inner layer
A 2550 gram box is pushed across the floor with a net force of 18 .0 N.
What is the acceleration of the box across the floor?
Answer:
The acceleration of the box across the floor is 7.0588 [tex]m/s^2[/tex]
Explanation:
Given:
Mass of the box = 2550 gram
net force acting on the box = 18 .0 N.
To Find:
The acceleration of the box across the floor = ?
Solution:
Newton's 2nd Law of Motion states that the acceleration of an object as produced by a net force is "directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. "
Newton's Second Law formula is
F = m a
Where:
F = the magnitude of the net force, in N
m = the mass of the object, in Kilogram
a = the acceleration of the object, in [tex]m/s^2[/tex]
Now substituting the values, we get
18.0 = a (2.55) [since 2550 gram = 2.55 kg]
[tex]a = \frac{18.0}{2.55}[/tex]
a = 7.0588 [tex]m/s^2[/tex]
A scientist prepares to examine a slide of bacterial cells and another slide of animal cells
under a microscope. In which of the cells can she expect to observe lysosomes?
Group of answer choices
in the animal cells only
in the bacterial cells only
in both the bacterial and animal cells
. in neither the bacterial nor the animal cells
Answer:
The answer is C- Lysosomes are present in both bacterial and animal cells.
Explanation:
Lysosomes contain digestive enzymes inside them, which when released break down damaged cell parts. These enzymes are acidic in nature and are separated from other organelles with the help of a membrane.
Lysosomes help in killing bacteria and virus invading the cell body. Lysosomes also take part in the process of cell death known as 'apoptosis'. This happens only when a certain cell is beyond repair.
Lysosomes are present in plant cells, animal cells, bacterial and yeast cells.
Answer:
Its in the animal cells only
Explanation:
just trust me we went over this in class but if you want an explanation:
The plant cell has a cell wall, chloroplasts, plastids, and a central vacuole—structures not found in animal cells. Plant cells do not have lysosomes or centrosomes.
What is the scientific name of tiger?
It was originally Felis Tigris, but in 1929, a British taxonomist used Panthera tigris
How are the processes of photosynthesis and respiration related to one another?
Answer:
Photosynthesis and respiration are so interrelated with each other that one’s product are used as another’s reactant.
Explanation:
Photosynthesis is a process used by organisms to convert 'light energy' into 'chemical energy', which is used as a source of energy for the organism. Respiration is a process in which glucose and oxygen is used to create ATP for the survival of the organism. During photosynthesis 'water and carbon dioxide' reacts in presence of light to create oxygen and glucose. Without photosynthesis and respiration life ceases to exist on earth.if a strong odour smell continuously for sometime,the sensation of smell of that substance weaken...why?
Answer:
Diffusion
Explanation:
The definition of diffusion is that: The movement of particles and ions from the area of higher concentrated region to the area of lower concentrated region due to the result of their random movement . When the strong odour particles are in one place it becomes concentrated in that area. Therefore, according to this, the odour diffuses from the higher concentrated area to the lower concentrated area, causing the particles to bounce off and spreading in all directions which results to the sensation of smell of the strong odour weakening.
Answer:
Olfactory fatigue/adaptation-after being exposed to a particular smell for a prolonged time, the smell sense diminishes. This temporary and normal
Explanation:
This adaptation is important as it prevents our nervous system from information overload
!HURRY! 20 POINT!
Describe the growth experienced by the city of Dubai. What environmental problems has the city faced? Your answer should be written in four or more complete sentences.
Dubai has rapidly urbanized in the previous 50 years, growing from a tiny fishing community to a significant city. The finding of oil in the area led directly to this urbanization.
What growth experienced by the city of Dubai?Dubai was able to develop beautiful structures, resorts, and artificial islands because of its oil sector wealth. There were 1 million individuals drawn to this. Because environmental considerations were not completely taken into account as building took place, the city has had problems as a result of this rapid growth.
The city's water supplies are the cause of Dubai's biggest issues. The absence of waste treatment options is a worry because it leads to water pollution. Industrial garbage and sewage have been poured into waterways. The restricted quantity of freshwater is another issue.
Therefore, Desalination procedures are now required in Dubai because of the city's enormous population in order to supply residents with drinking water.
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Answer:
Over the last 50 years, Dubai has experienced rapid urbanization, evolving from a small fishing village to a major city. This urbanization was a direct result of the discovery of oil in the region. Wealth from the oil industry allowed Dubai to create impressive buildings, resorts, and artificial islands. This attracted a population of 1 million people. This fast growth has caused issues for the city because environmental concerns were not fully considered as construction occurred. The greatest problems in Dubai are related to the city’s water resources. Water pollution is a concern because of the lack of waste treatment options. Sewage and industrial waste have been dumped into water sources. Also of concern is the limited supply of freshwater. With Dubai’s large population, desalination processes have become necessary to provide people with drinking water.
Explanation:
got it right on t4l
What do you think is the evolutionary significance of DNA polymerase? What do you think would happen if there was a genetic mutation on the genes encoding for DNA polymerase?
Hi I was gonna say that I needed help in this too because eventhough i did the reading im still struggling to undestand this
DNA polymerase is crucial for accurate DNA replication and maintaining genetic stability in organisms. Mutations in the enzyme can increase mutation rates or be lethal, and the enzyme's proofreading ability is essential for DNA error correction and generating genetic variation necessary for evolution.
The evolutionary significance of DNA polymerase is profound, as it's a key enzyme responsible for replicating DNA during cell division, ensuring that genetic information is accurately passed on to daughter cells. Its ability to proofread and correct errors during DNA synthesis is critical for preventing mutations and maintaining genetic stability. DNA polymerase also contributes to genetic variation, which is the raw material for evolution by natural selection. Without this variation, evolutionary processes would stagnate, and species would be less adapted to change.
Mutations in the genes encoding for DNA polymerase could have serious implications for an organism. If the proofreading function is impaired, the mutation rate increases, potentially leading to diseases such as cancer. On the other hand, a complete lack of DNA polymerase activity would be lethal, as DNA replication is essential for cell division and survival.
Genetic variation is introduced during DNA replication through the occasional errors made by DNA polymerase, even with its proofreading ability. If DNA replication were error-free, this source of variation would be lost, severely limiting evolutionary potential. Moreover, changes such as mutations, deletions, duplications, and the subsequent repair can affect the genetic makeup of organisms.
Role of a Primer in DNA Replication
A primer is required to start DNA replication because DNA polymerases can only add nucleotides to an existing strand. Without a primer, DNA polymerases would have no starting point, making replication impossible, which would be evident in a DNA sequencing reaction that lacked a primer in its mix.
Which ecosystem has a better chance of
surviving when environmental conditions change
over a long period of time?
a. one with a great deal of genetic diversity
B.one with plants and animals but no bacteria
C.one with animals and bacteria but no plants
d. one with little or no genetic diversity
ooo
The ecosystem that has a better chance of surviving should be that deals in genetic diversity.
What is genetic diversity?It means the range of various inherited traits that lies within the species. In the case when the species does have high genetic diversity so there are various individuals that does have various traits. So for surviving purpose at the time of change in the environmental conditions for the long period of time the one should be dealt with the genetic diversity.
Therefore, the option a is correct.
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An ecosystem with a great deal of genetic diversity has the best chance of survival when facing long-term environmental changes, as it offers a wide range of adaptable traits and maintains ecosystem health.
Explanation:An ecosystem with a great deal of genetic diversity has a better chance of surviving when environmental conditions change over a long period of time. This is because genetic diversity acts as the raw material for adaptation and evolution within species. It allows for a higher variety of traits that may offer advantages under new environmental conditions. Genus B, which has greater genetic diversity, is more likely to harbor traits that confer an advantage in the changed environment, and thus has a higher probability of thriving compared to a genus with little or no genetic diversity.
Ecosystems with diverse interactions between plants, animals, and bacteria, such as the ones in coral reefs and prairies, show that loss of diversity can lead to a decline in biological productivity and co-adaptation features. An ecosystem lacking components such as bacteria or plants would struggle to maintain its ecological functions. Therefore, a diverse ecosystem not only contributes to the adaptability of individual species but also to the overall health and sustainability of the ecosystem itself.
What was the main goal of the Human Genome Project
The purpose of the Human Genome Project was to map out the complete sequence of human DNA, leading to a greater understanding of our genetic makeup and the potential genetic basis of diseases for medical advancements.
Explanation:The main goal of the Human Genome Project was to determine and map out the complete sequence of DNA base pairs of the human genome. This refers to understanding the genetic makeup of the human species. By doing so, we could gain a better understanding of human evolution, genetics, and the potential for medical breakthroughs such as uncovering the genetic basis of diseases. Ultimately, the project aimed to boost our understanding and potential manipulation of human genetics to improve health and medicine.
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The main goal of the Human Genome Project was to sequence the entire human genome, gain a better understanding of human chromosomes, and use the data for applied research on genetically related diseases.
Explanation:The main goal of the Human Genome Project was to sequence the entire human genome, which is the complete collection of genes in an individual. By analyzing and mapping the DNA subunits and the location of each gene, researchers aimed to gain a better understanding of human chromosomes and genetic makeup. This project relied on basic research with both simple organisms and the human genome, with the ultimate goal of using the data for applied research like finding cures and early diagnoses for genetically related diseases.
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What happens when you turn on a
light?
A. Electrical energy is transformed into heat and
light.
B. Electrical energy is transformed into motion
and light.
C. Electrical energy is transformed into nuclear
energy and light.
D. Electrical energy is transformed into sound
and heat.
Answer:
A
Explanation:
When the electricity runs through the wire and begins to heat up, it starts to give of heat and light energy, because the wire becomes hot and reacts with the gas in the light bulb to make light.
Hope this helps:)
If an isotope of some element has a half-life of 300 years, about how much of the isotope atoms will be in a sample after 300 years?
Answer:
The isotope atom in the sample after 300 years will be half.
Explanation:
If the half life of the isotope of an element is 300 years, after 300 years, in this case the mass of the sample provided will become half of the previous initial mass of the substance. As we know the half life is the time that is required for the element to change or decay. The radioactive isotopes have their own half life which are found to be independent of various factors i.e. temperature, concentration and other chemical changes.
The combination of mitotic cyclin with CDK signals the __________.
Question 17 options:
beginning of cell mitosis.
completion of cytokinesis.
growth of a cancer cell.
start of the cell cycle.
Answer:
The correct answer is beginning of cell mitosis.
Explanation:
Cyclins are cell cycle regulatory protein which regulates the catalytic activity of cyclin dependent protein kinase or CDK.From the name cyclin dependent protein kinase it can be concluded that CDK helps in the phosphorylation of key proteins of cell cycle.
The combination of cyclin with CDK helps in the progression of cell from one phase to another.
Such as cyclin A CDK 2 helps also called G1 cyclin CDK helps in progression of cell from G1 to S phase whereas Cyclin B CDK 1 or M cyclin CDK helps in beginning of mitosis phase or M phase of the regulated cell.
"A single-celled organism extends its
cytoplasm around its desired particle and
brings the particle inside of itself.
Essentially, the cell is consuming this
particle."
Which term below means "cell eating"?
A. phagocytosis
B. pinocytosis
C. exocytosis
Answer:
A single cell organism extends its cytoplasm around its desired particle and bring the particle inside of itself. The cell consuming the particle this 'cell eating' is known as PHAGOCYTOSIS
Explanation:
Single celled organism amoeba don't have well developed digestion system as higher animals. They use their cytoplasm for these functions to perform.
PHAGOCYTOSIS- By this process some cells eat/engulf their food or required particle. When any food particle is present near the amoeba. amoeba extends its plasma membrane with cytoplasm around the particle and trap the particle in a new vacuole. For digestion lysosomes fused with the vacuole containing food particle and enzymes secreted to the vacuole and this way food particle digested.
PINOCYTOSIS-In pinocytosis cell wrap arround the liquid droplet instead of solid food particle. Cell extends its cytoplasm to engulf the liquid.
EXOCYTOSIS- This is the process to secrete the waste material out from the body after digestion. This is the excretion system of amoeba. In this process vesicles form containing waste of the cell and cytoplasm move in this way away from the vesicle and reached on the surface of membrane. In this way vesicles discharge on the outer membrane.