I need help with this!!! The question is:

What are two pieces of evidence Darwin used to support his theory of evolution by natural selection?

Answers

Answer 1

Answer:

fossil, biogeographical, and anatomical evidence.

Explanation:

pbs


Related Questions

What are Interphase, prophase I, metaphase I, anaphase I, telophase I, prophase Il, metaphase II, anaphase II, telophase Il in meiosis.

Answers

The stages of meiosis 1 and meiosis 2 is discussed below:

What is meiosis?

Eukaryotic cells (plants, animals, and fungi) reproduce sexually through a process called meiosis. Chromosome reduction is the process by which haploid cells are created from diploid cells, which are cells with two complete and identical sets of chromosomes.

The number of chromosomes in each cell is halved during meiosis I, which starts with one diploid parent cell and ends with two haploid daughter cells.

Maintaining the number of chromosomes in each cell, meiosis II begins with two haploid parent cells and finishes with four haploid daughter cells. Before meiosis II, homologous pairs of cells divide into chromosomes while in meiosis I.

These chromosomes are further divided into sister chromatids during meiosis II. Meiosis II does not include genetic material crossing across or recombining between chromosomal pairs, whereas meiosis I do.

This happen in the  prophase contains five subphases and is lengthy and complex during meiosis I. The equatorial plane in meiosis II is aligned 90 degrees differently than in meiosis.

Therefore interphase1, prophase 1, metaphase 1, anaphase, and telophase 1 are the stages of meiosis 1 and prophase Il, metaphase II, anaphase II, and telophase Il in meiosis 2.

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Which function involves the circulatory system working with the respiratory system?

A. Lowering body temperature

B. Enabling cellular respiration

C. Stopping bacterial infection

D. Maintaining liver function

Answers

The function involves the circulatory system working with the respiratory system is Enabling cellular respiration. Thus, option "B" is correct.

What are circulatory and Respiratory system?

Respiratory system is a set of organs which help in the exchange of gases in the body. They bring oxygen from outside into the body and release carbon dioxide from inside the body to the outside world. The exchange of the gases takes place at the alveolar site (or gills in aquatic animals).

The circulatory system then carries this oxygen (mixed in blood) from gas exchange site to all the cells of the body. In addition, it also brings carbon dioxide (waste product of cellular respiration) from all the cells to the gas exchange site (respiratory system).

Thus, option "B" is correct.

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Please put the letters by the number :))

Answers

Answer:

1 - e

2 - c

3 - a

4 - d

5 - b

Explanation:

Chlorophyll is found in the thylakoid which are found in chloroplast

Answers

Chlorophyll is found in the thylakoid which are found in chloroplast .

True ✔
And chloroplast is in the plant cells this is true

Type your response in the box.


Cell theory states that all living things contain one or more cells. Why do you think cell theory meets the definition of
a scientific theory? Do you think it should be a scientific law? Explain your response.

Answers

Answer:

In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells

The offspring of a black cat and a white cat is a gray cat. It has the genotype BW. B is black and W is white.

If a black cat mates with a gray cat, the chance the offspring will be white is
percent.

Answers

When a black cat (BB) mates with a gray cat (BW), the chance the offspring will be white is 0% (zero).

What is Genotype?

Genotype may be defined as the ultimate combination of alleles of those genes which are selected for specific studies.

When a black cat (BB) mates with a gray cat (BW), it produces offspring with the genotypes BB, BW, BB, and BW. None of them are WW (white).

The Punnett square of the given cross is illustrated below:

Therefore, it is well described above.

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1. Ms. L's symptoms include shortness of breath, a chronic cough productive of thick mucus,
and a "chest cold" of 2 months' duration. She was advised to quit smoking, a major cause of
lung irritation. These symptoms were caused in part by the obstruction of groups of alveoli
by mucous plugs. Ms. L was told that the mucus is not moving normally out of her airways
because the toxins in cigarette smoke paralyze small cell extensions that beat to create an up-
ward current. These extensions are called

Answers

The small cell extensions that beat to create an up-ward current are called microvilli.

What are microvilli?

Microvilli are small extensions which are found on the surface of the alveoli of the lungs.

The microvilli play an important role in the lungs as the help to remove particles and mucus that may obstruct the lungs as a result of the upward current they create in the lungs from their beating motion.

Therefore, the paralyzed small cell extensions that beat to create an up-ward current are called microvilli.

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Which of the following organelles is common to both prokaryotic and eukaryotic cells?
A.
Cytoskeleton
B.
Nucleus
C.
Nucl

Answers

Answer:

A) Cytoskeleton

Explanation:

The cytoskeleton is a network of fibers extending through the cytoplasm that provides. mechanical support and maintains the cell's shape.

A Cytoskeleton is the answer

Diego is conducting an experiment to investigate how temperature affects chemical change. He has three pieces of cheese that he just bought from the store. He left one piece of cheese outside, one on the kitchen counter, and one in the refrigerator. His prediction is that the piece in the refrigerator will not mold, the one on the counter will mold a little, and the one outside will mold a lot. Select the conclusion The piece of cheese in the refrigerator had the most amount of chemical change. The piece of cheese on the counter had the most amount of chemical change. The piece of cheese in the refrigerator had the least amount of chemical change. The piece of cheese outside had the least amount of chemical change.

Answers

The piece of cheese in the refrigerator had the least amount of chemical change.

Moulding occurs on substances which are warm and moistMold thrives in warm and humid placesIn refrigerators, the environment is cool and dryThis environment hinders the growth of moldThe bacteria and fungi require optimum temperatures to flourish, which is not present in a refrigeratorThe cheese placed outside and on the counter will grow mold as those environments do not arrest the growth of moldRefrigeration ensures that food is not spoilt

Therefore, the least amount of chemical change takes place on the cheese placed in the refrigerator.

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1. The words rotate and revolve have the same meaning when describing the motion of planets.
a. True
b. False

Answers

Answer:

False

Revolution:

The movement of the Earth around the Sun, once every 365.25 days is called a revolution.

Rotation:

The movement of the Earth as it takes 24 hours to spin on its axis is called a rotation.

How many feedback loops are possible in a food web of 20 species?

Answers

There are thousands of feedback loops possible in a food web of 20 species. Why? Well, on average, about 60% of the food we eat comes from carbohydrates. This process can be repeated multiple times, where positive feedback loops are counteracted by negative feedback loops. Upon reference to a food web of 20 species, thousands of feedback loops are possibly created through this process.

The area around a pond is cooler than the rest of the forest. Which term describes the area around the pond?

Answers

The term microclimate best describes the area around the pond.

What is Pond?

A pond may be defined as an aquatic habitat which is a tiny body of still water originated naturally or by artificial norms. It is usually smaller than a lake.

A microclimate may be defined as a climate of a small area or a distinct place within a location as distinguished from the surroundings of the complete area.

A microclimate usually involves a very smaller area in contrast to determining the climate of a particular location.

The complete question is as follows:

The area around the pond is cooler than the rest of the forest. Which term describes the area around the pond?

BiomeMicroclimateMacroclimate

Therefore, the correct option for this question is B, i.e. microclimate.

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Given the following crosses give the outcome. What can be the blood types of their children.

Type AB blood x type 0 blood

Answers

Answer:

For this question, you have to draw a punnet square

Explanation:      

               A              B

i              Ai              Bi

i               Ai              Bi

For AB blood type, one parent can give either an A or a B. For the other parent because they are 0 blood type that means that they are negative for both factors.

For someone who would be A, they could be AA or Ai( but that is irrelevant for this question)

The i reffers to no antigen markers, it is kind of just a placeholder. You could have written (O,O) instead

Which of these best describes a hormone?

A. A chain of amino acids secreted by a gland

B. A neurotransmitter with a specific target

C. A neurotransmitter carried in the blood

D. A chemical message secreted by a gland

Answers

Answer:

option D

A chemical message secreted by a gland.

Explaination: A hormone is a chemical that is made by specialist cells, usually within an endocrine gland, and it is released into the bloodstream to send a message to another part of the body. It is often referred to as a 'chemical messenger'.

which graph represents a species that has a smaller gestation and maturation period, smaller number of offspring, and little or no paternal care?

Answers

The graph containing r selected species such as rodents and insects will represent a species that has a smaller gestation.

What is R selected species?

These type of organisms have a high reproductive rate because of the smaller gestation and maturation period.

They also have smaller number of offspring with little or no paternal care as they are able to take care of themselves.

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Which of these has not been used as an RNA probe?

a. Fluorescence probes
b. Radioactive probes

c. Non- radioactive
d. Cellular probes​

Answers

Answer:

I think the answer is Cellular Probes.

Explanation:

I hope this helps! Correct me if I am wrong.

Question 2
If purple flowers are dominant to white flowers. What are the possible genotypes of an organism with a purple phenotype?
Your answer:
O Pp. pp, PP
O PP, PP
0
PP
Pn

Answers

Answer:

Pp, PP

Explanation:

Purple: P

White: p

Purple flowers can still carry the white flower trait, that's how their offspring gets it. Since this offspring is purple, the dominant trait is present and will always show over the recessive trait. So of you get a purple flower the possible genotypes are PP and Pp, if you have a white flower the possible genotypes are only pp. :)

Type the correct answer in the box. Spell all words correctly.
What does the scientific method help test in environmental science?
The scientific method is a way to test a
and gain a better understanding of the world.

Answers

The scientific method is a way to test a hypothesis and gain a better understanding of the world.

What is the scientific method?

The scientific method is a process used to explore observations and answer questions.

The usual process involves making conjectures -that would be the hypotheses-, drawing predictions resulting from a logical consequence, and carrying out experiments based on those predictions.

The ultimate goal is to test a scientific hypothesis.

Thus, this could be the answer.

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One of the primary concepts of biology is natural selection which is based on the principle of an organism s ability to adapt to their surrounding environment. This concept also applies to all life on Earth, and it is certainly applicable to people in the workplace as well.

Thinking futuristic, to when you will have established your unique niche in the medical field, what traits do you possess that will give you the ability to adapt and thrive within your workplace environment?

Answers

Answer:

I think the traits you possess that will give you the ability to adapt and thrive in your workplace environment depends on your passion and skill for medicine and able to collaborate with colleagues. Hope it helps!

Based on the reactivity of catalase in the enzyme concentration lab, do your results in testing enzyme concentration support your hypothesis?

Answers

There were more substrate molecules to bond with the active site of the catalase enzyme as the substrate concentration increased.

What is an enzyme?

The enzymes are the chemical molecules that alter the chemical reaction when added in a specific amount, it either increases the reaction, or decrease it.

There were more substrate molecules to bond with the active site of the catalase enzyme as the substrate concentration increased.

Because the substrate concentration increased each time, there was a greater chance that the substrate would bind to the active site and carry out the reaction.

Thus, this way the enzyme concentration affects the reactivity.

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What is Animalia Kingdom​

Answers

[tex]{\huge \underline{{ \fbox \color{red}{A}}{\fbox \color{green}{n}}{\fbox \color{purple}{s}}{\fbox \color{brown}{w}}{\fbox \color{yellow}{e}}{\fbox \color{gray}{r } }}}[/tex]

It is composed of multicellular, eukaryotic, heterotrophic, aerobic, and immotile organisms that reproduce through spores, either sexually or asexually.

I hope I've helped : )

Answer:It is composed of multicellular, eukaryotic, heterotrophic, aerobic, and immotile organisms that reproduce through spores, either sexually or asexually.Explanation:

[tex]\sf XD [/tex]

Describe artificial selection, and explain how it is different from natural selection.

Answers

Answer:

Starting with natural selection, the most robust and most intelligent animals survive over the weakest. The weak animals eventually die off because they can't keep up with nature. Artificial selection isn't natural; certain species are being targeted on purpose and decide whether to stay alive or not. At this point, it is not at all about whether the species can survive or not because it's most likely being protected.

The release of greenhouse gases from one state can enter another state due to atmospheric circulation. If there is a problem between states, what do you think would be the best way to handle this problem???

Answers

Due to atmospheric circulation, the greenhouse gases can enter from one state to another state. These changes are caused by extra heat in the climate system due to the addition of greenhouse gases to the atmosphere.

What are the ways to handle greenhouse effect?

The Earth's radiated energy is trapped by greenhouse gases such carbon dioxide, methane, nitrous oxide, and some manmade compounds, which keeps heat in the atmosphere.

The best way to handle this problem are:

Fossil fuels should remain underground.Switch to electric vehicles fast.Make the world's energy supply renewable.Double the extent of forest and rehabilitate habitats.Stop supporting fossil fuels abroad.

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What happens at the end of the dark reactions?

Answers

Answer: Glucose is the end product of the dark reaction.

Explanation:

1. Which human traits form a wide range of states instead of two distinct states?
A) cleft chin
B) eye color
C) widow's peak
D) fully attached earlobes

2. Don's earlobes are fully attached, Both of his parents have free earlobes (not fully attached). One of Don's grandparents has fully attached earlobes, like he does.
What can be said about fully attached earlobes?
A) Fully attached earlobes are dominant. Both of Don's parents do not have them
B) Fully attached earlobes are recessive. Both of Don's parents have them.
C) Fully attached earlobes are dominant. They skip a generation in inheritance.
D) Fully attached earlobes are recessive. They skip a generation in inheritance.

3. A scientist is doing experiments using some ancient seeds discovered in an ancient temple.
Which option is a prediction that relates the outcome of the scientist's experiments with probability?
A) The scientist thinks that the seeds were in the temple as part of a ritual.
B) The scientist thinks that more seeds can be recovered from other similar locations on Earth.
C) The scientist thinks that seeds that are old have 0% chance of sprouting; so, if they do, they must be modern.
D) The scientist thinks that if conditions are good, about 10% of the seeds will sprout and grow into plants

4. Which option describes how genes control the traits of a cell?
A) Genes code for specific structures and molecules in a cell. Those structures and molecules form the traits of the cell.
B) Genes become building blocks for specific structures and molecules in a cell. Those structures and molecules farm the traits of the cell.
C) Genes determine how much energy goes to each organelle in the cell. The organelles form the traits of the cell.
D) Genes are molecules that organelles are made out of. Once assembled into organelles, they form the traits of the cell.

Answers

Explanation:

hope it helps

thank you!!!

The human eye color is a trait which forms a wide range of states instead of two distinct states. Fully attached earlobes is a recessive trait which is seen in a very rare cases. Thus, the correct options are 1 (B), 2 (D), 3 (D), and 4 (A).

What are traits?

Traits are the characters which are controlled by the genes. Genes are present on the DNA molecule which encodes for different proteins which are responsible for the traits or phenotypic characters of an organism.

Quantitative traits are the traits for which the phenotypic variation is continuously distributed in the populations, with the variation in population often approximating the normal distribution on an appropriate scale. The human eye color is an example of quantitative trait which is controlled by different genes.

Recessive traits are the traits which are seen very rarely as these are only shown when present in homozygous condition. These traits are seen to skip generations as seen in the case of fully attached earlobes.

When a scientist is doing experiments using the ancient seeds which he discovered in an ancient temple, the scientist thinks that if the optimum conditions are provided to the seeds then about 10% of the seeds will sprout and therefore grow into plants.

Genes are the parts of the DNA which are responsible for encoding proteins. These proteins controls the phenotypic characters of an individual.

Therefore, the correct options are 1 (B), 2 (D), 3 (D), and 4 (A).

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Explain why there are fewer organisms at higher trophic levels.​

Answers

Answer:

As we move to higher Trophic levels, we will, generally speaking, see larger animals. And yet, moving to higher trophic levels, these larger animals need to live on smaller energy production from the next trophic level down. As a result, there will usually be fewer animals at higher trophic levels.

Explanation:

Macrolides generally have bacteriostatic and bacteriocidal activity?

1.true
2.false

Answers

Macrolides generally have bacteriostatic and bacteriocidal activity?

A. True

B. False

#carry on learning

Define Evolution and Natural Selection

Answers

Answer:

Evolution may be defined as any net directional change or any cumulative change in the characteristics of organisms or populations over many generations—in other words, descent with modification… It explicitly includes the origin as well as the spread of alleles, variants, trait values, or character states.

Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others

Explanation:

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Which brain regions were removed during H.M.’s surgery? Select all that apply
- amygdala
-hippocampus
-medial temporal lobe
-cerebellum
-basal ganglia

Answers

Answer:

hippocampusmedial temporal lobe

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The process of accumulating higher and higher amounts of a toxic material such as mercury or PCBS within the body of any animals is called?

1. biological resistance

2. biological half-life

3. bioaccumulation

4. biological demagnification

Answers

Answer:

Bioaccumulation

Explanation:

Bioaccumulation is the of accumulation of harmful chemicals.

Other Questions
Read the excerpt from The Common Sense of Bicycling: Which step comes first in the procedure described in theBicycling for Ladies.excerpt?To learn to balance, have the saddle raised as high aspossible, so that the ball of the foot just touches thepedal at its lowest Practise wheeling in this way, with aninstructor, or alone on a smooth surface where you aresure to be undisturbed.O pedaling with the ball of the footO adjusting the seatO practicing aloneO practicing with an instructor cead the excerpt from a speech.There is no doubt that our town needs a higher budgetor the transportation department. Have you ever seenthe roads here? It feels like you're driving on a dirtroad, not a road that's supposed to be smooth andpaved-right? Residents can't drive more than twentyfeet without hitting massive potholes, risking thousandsof dollars in damage to their vehicles. Why, just a weekago, a voter was telling me about the giant hole onWheeler Road, and then, what do you know?Yesterday, he texted me a picture of his car with a flattire and a broken rim, and then a bill with an estimate ofHow does the speaker use rhetorical questions todevelop tone?O By appealing to the senses of the reader, thespeaker creates a dangerous tone.OBy encouraging the listener to take action, thespeaker creates a powerful tone.O By asking the listener to agree with the claims, thespeaker creates a brash tone.O By relating to the experiences of the listener, thespeaker creates an impassioned tone. Enter your answer in the provided box. Crystalline silicon has a cubic structure. The unit cell edge length is 543 pm. The density of the solid is 2.33 g/cm3. Calculate the number of Si atoms in one unit cell. atoms/cell 6. A metal block increases in temperature from 15 C to 60 C when supplied with 13 500 J of heat energy.a) Calculate the heat capacity of the metal.b) Calculate the specific heat capacity of the metal, if this sample has a mass of 0.75 kg. A woman takes her dog rover for a walk on a leash. She pulls on the leash with a force of 30.0 N at an angle of 29 above the horizontal sidewalk. What force is tending to lift Rover vertically off the ground?Please help I'm stuck. The size of a mumps virus isapproximately 0.000 000 19 metres.What is this value in standard form? Giveyour answer in metres (m). Two related populations separated by a mountain range for many generations eventually become different species providing an example of what type of speciation The mean cost of a five pound bag of shrimp is 40 dollars with a standard deviation of 7 dollars. If a sample of 51 bags of shrimp is randomly selected, what is the probability that the sample mean would be less than 40.6 dollars? Are microorganisms best suited for dry, warm environments? pleasee help me with this function asap there are recent out break in your school; write a letter to the district office, complaining about the unsanitary condition of your school, suggesting at least four ways of improving the situation. Shane is 12 meters behind the leader in a running race. Kathy is 5 meters behind the leader. Lilly is 5 meters ahead of the leader. Who is/are the nearest to the leader? factorise:y(x+z)+z(x+y)+y^2+z^2 According to the passage, the tubes displayed at the Paris Exposition wereO placed in the window of a barber shopO designed to attract customers to purchase goodsO meant to attract attention to a new technologyused to convey a written message Why do scientists refer to inputs and outputs of carbon in the environment as a cycle? Which describes how Africa was divided into countries?O A. Africa was divided up based on long-standing cultural differences.B. Africa was divided up based on a system of African elections.C. Africa was divided up with the goal of extending the slave trade.OD. Africa was divided up by Europeans who had little concern forAfrican traditions.SUBMIT This map shows the provinces and states controlled by one imperialist nation in the 1800s and 1900s. which nation controlled the shaded territories on the map? france 0 great britain o japat 0 china 1) Consider this row in the periodic table. What changes can you predict based on what information is provided by the boxes for each element?A) The elements change from solids to gases and the valence electrons decrease in number. B) As you move across the row, the number of electrons increases and reactivity also increases. C) They have different atomic numbers and mass numbers; they have the same number of valence electrons. D) Both the atomic numbers and the mass numbers increase; the least reactive element is in the last box.USA test prep question The sum of the measures of two exterior angles of a triangle is 264. What is themeasure of the third exterior angle? The flux through the coils of a solenoid changes from 2.57.10-5 Wb to 9.44.10-5 Wb in 0.0154 s. If 4.08 V of EMF is generated, how many loops does the solenoid have? (No unit)