what do dna evidence and the fossil record indicate are the ancestors of the living cetaceans, the mammalian group that includes whales, dolphins, and porpoises?

Answers

Answer 1

DNA evidence and the fossil record indicate are the ancestors of the living cetaceans were land-dwelling mammals. DNA evidence allows to trace the evolutionary origin of taxonomic groups.

DNA evidence refers to the linear order of nucleotides, which can be used to trace the evolutionary origin of a particular taxonomic group.

When the linear order of DNA nucleotides is conserved, it is known as sequence homology.

Fossils are preserved remains of organisms that once lived on the Earth, which can also be used as evidence to trace the evolutionary origin of a given group.

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Related Questions

PLEASE HELP!!!!!!!!

Which phrase best describes the context of a speech?

A. The crowd's overall feelings

B. The visual aids the speakly uses

C. The quality of the fact-checking

D. The evidence the speech presents

Answers

Answer:

  I believe it would be D The evidence the speech presents

Explanation:

  The context of a speech refers to the purpose, which makes me think it would best be described as the evidence since evidence is used to prove your purpose.  

HELP PLEASE!!!!!!!!!!!!!!!!

Answers

Answer:

Sandatone-1

Igneous Rocks-4

Shale-2

Limestone-3

Explanation:

Explain reproduction in gymnosperms. Biology

Answers

gymnosperm, any vascular plant that reproduces by means of an exposed seed, or ovule—unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally “naked seeds”) are borne in cones and are not visible until maturity.

Which is a point mutation and not a frameshift mutation?
mutagen
insertion
deletion
silent

Answers

Answer:

The correct answer is D. Silent

I can assure this is the correct answer because I took either the test or review, I don't remember but yeah I know its correct also, because of the other person so be sure to say thanks to them before me!

Hope I helped! <3

A silent mutation is a point mutation and not a frameshift mutation. Therefore, the correct statement is option D.

What are point mutations?

Mutagens are agents causing mutations in DNA sequence. Point mutations are due to a change in a single nucleotide base in a DNA sequence and frameshift mutations are due to changes that are the result of the insertion or deletion of nucleotide bases, thereby, shifting the reading frame of the sequence and the way is changed in which it is translated into a protein.

A silent mutation is a point mutation that does not change the amino acid sequence of a protein, as the mutated codon still codes for the same amino acid, thereby, not affecting the function of the protein.

Insertion and deletion mutations are frameshift mutations as they alter the reading frame of the sequence which results in a completely different amino acid sequence.

Therefore, the silent mutation is a point mutation.

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What is the single greatest threat to biodiversity?

Answers

Answer:

Habitat loss

Explanation:

Habitat loss is the single greatest threat to biodiversity on Earth today and in fact it is the second largest threat to our existence on this planet next to Climate Change.


Which is not a source of carbon dioxide gas?

Answers

Answer:oxygen.

Explanation: Photosynthesis does not produce carbon dioxide. It takes up carbon dioxide and water and releases oxygen.

2. A sugar, a phosphate group, and a nitrogen base form the building blocks of which macromolecule?
a) Carbohydrates
b) Lipids
c) Nucleic Acids
d) Proteins

Answers

Answer:

c) Nucleic acids

Explanation:

Because DNA has those components

How might having lots of different vegetation species lead to a greater biodiversity in animals?

Answers

Answer:

different vegetation attracts other species around the area for food, creating biodiversity among animals

Explanation:

How many combinations of A, C, G, and U exist? Include an equation

Answers

Answer:

64

Explanation:

4 ^ 3 because your first nucleotide can be any of the 4, same with your second, and same with the last nucleotide. 4^3 tells you there are 3 different positions that 4 different bases can be placed.

Hope this helps!

There are 64 possible combinations of nucleotides to form a given amino acid.

The genetic code to add an amino acid is the result of a triplet of nucleotides or codons.

In consequence, there are 4^3 possible combinations of nucleotides in a codon.

This number (64) gives us the number of different codons that can be found in the genetic code.

In conclusion, there are 64 possible combinations of nucleotides to form a given amino acid.

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What element is most commonly compared in science fiction stories?
point of view
setting or "worlds"
characters
the author language arts

Answers

Answer:

the answer is setting or "worlds"

which organ uses the circulartory system to communicate with cell throughout the body and control the amount of sugar they have available

pancreas
liver
heart
kidney

Answers

Answer:

pancreas

Explanation:

its because the pancreas produces insulin which regulators the amount of sugar in the body

The pancreas since this releases insulin which is involved in regulating body sugar

a lion is running through the savanna chasing a gazelle. he is using a lot of energy to do this. which process allows his body to produce this energy?

Answers

Cellular Respiration is the answer also you can use quizlet to help you get the answers.

I missed a lot of school days due to problems

Answers

Answer:

tufffffff

Explanation:

the structures responsible for carrying information all over your body are

Answers

That would be the nervous system.

The body is made of organs, cells, tissues,
and organ systems. Which is the most
abundant?
please help

Answers

the most abundant is cells

The most abundant in the body is cells.

What do you mean by cells?

Cell is the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body. A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm.

Moreover, they provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function.

There are two main types of cells: prokaryotic cells and eukaryotic cells. Prokaryotic cells include bacteria and archaea. Prokaryotes—organisms composed of a prokaryotic cell—are always single-celled (unicellular). Prokaryotic cells don't contain a nucleus.

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An individual has a genotype of IBi. What is their blood type?

Answers

Answer:

type B

.................

3. What challenges do older generations face?

Answers

Answer:

Health problem. As aging occurs, the more weak and unstable the body gets.

Unporportionate generation distribution. Some older generations are larger than the ones that precede it, thus, making it harder to have the proper resources to take care of older generations.

Technology. It is harder for older generations to be up-to-date on technology. This can make it harder for older generations to function in society properly.

I hope this satisfies your question. Please give brainliest answer!

Explanation:

Using 3-5 sentenes explain how catbon dioxide affetcts earth's clmate.

Answers

Answer:

Carbon dioxide is a greenhouse gas: a gas that absorbs and radiates heat. ... But increases in greenhouse gases have tipped the Earth's energy budget out of balance, trapping additional heat and raising Earth's average temperature.

Explanation:

Carbon dioxide is a greenhouse gas: a gas that absorbs and radiates heat. ... But increases in greenhouse gases have tipped the Earth's energy budget out of balance, trapping additional heat and raising Earth's average temperature.

Which system of the body breaks down food into forms that the body can use?
O excretory system
O digestive system
reproductive system
O respiratory system

Answers

Answer:

digestive system

Explanation:

mark brainliest if youd like

Answer:

digestive system

Explanation:

Your digestive system breaks nutrients into parts small enough for your body to absorb and use for energy, growth, and cell repair.

Distinguish between smooth endoplasmic reticulum and rough endoplasmic reticulum.

Smooth endoplasmic reticulum has vacuoles attached to its surface.

Smooth endoplasmic reticulum has ribosomes attached to its surface.

Rough endoplasmic reticulum has ribosomes attached to its surface.

Rough endoplasmic reticulum has vacuoles attached to its surface.

Answers

Answer:

Rough endoplasmic reticulum has ribosomes attached to its surface.

Explanation:

Rough endoplasmic reticulum has ribosomes attached to its surface.

and smooth endoplasmic reticulum does not

Which portion(s) of the brain maintains homeostasis in the muscular system by coordinating skilled movements

Answers

Answer:

I know that hypothalamus is responsible for homeostasis, I don't know if any other part of the brain helps

The pedigree below depicts a dominant trait. What is the genotype of individual I-1 (use the letter A for a dominant allele and a for a recessive allele)? How did you come to this conclusion? Using your best grammar, write 3-5 sentences.

Answers

A pedigree chart is a diagrammatic representation showing the occurrence and appearance of phenotypes of a particular gene/traits and its ancestors from one generation to the next establishing relationships between individuals in a family.

Using the letter A for a dominant allele and a for a recessive allele, the genotype of individual I-1 is Aa.

In the key pedigree nomenclature, an individual marked with the black ink is affected with the trait (and this trait is dominant - A). Looking at the F1 generation, there are males affected and females as well. For inheritance of the trait, just one copy is enough to become affected. Therefore, the male parent is heterozygous for the trait and the female normal (aa) to enable the production of both affected and non-affected individuals.

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An animal that lives part of its life on land and part in water is known as what?

Answers

The answer is Amphibians.

Amphibians, such as frogs, have adapted to have thin, very permeable skin that is well supplied with blood vessels. How does this adaptation most likely help amphibians survive in aquatic environments?
A. It allows them to maintain fairly stable internal temperatures.
B. It allows them to absorb nutrients directly from their environment.
C. It allows them to release chemicals into their environment to attract mates.
D. It allows them to take in oxygen and release carbon dioxide through their skin.

Answers

Answer:

to allow easier gas exchange

Explanation:

following question:
Do you believe that the government should enforce automobile safety regulations? Remember
to use claim, evidence, and reasoning to support your answer. Please write a paragraph in ur own words. Do don’t copy off the internet please. Please I really need someone help right now. This is due at 11:59 pm. Please help

Answers

Answer:

isk

Explanation:

In the rain forest, the thick foliage allows limited sunlight to filter through to the forest floor. Which wild cat species is best adapted to living in the rain forest?

Answers

Answer

D)Ocelot because they are medium sized cats that live in rain forests and grasslands.Ocelots appear to be better adapted to habitat disturbance and can live in disturbed forests. However, they can be found in a variety of habitats in Belize, from dry scrub to the dense forests.

Whereas sodium is found mainly in the extracellular fluid, most ________ is found in the intracellular fluid.

Answers

Pretty sure the answer is potassium. Hope that helps:)

Please select the word from the list that best fits the definition

Preserved animal tracks are called ______ fossils.

Answers

Answer:

A Trace Fossil

Explanation:

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Trace fossils

Trace fossils include footprints, trails, burrows, feeding marks, and resting marks. Trace fossils provide information about the organism that is not revealed by body fossils.

nerve fibers from the medial aspect of each eye ________.

Answers

Cross over to the opposite side at the chiasma. Hope this helps, have a great day!

What term best describe the role of carbon dioxide in the human body

Answers

Answer:

Carbon dioxide is essential for internal respiration in a human body. Internal respiration is a process, by which oxygen is transported to body tissues and carbon dioxide is carried away from them. Carbon dioxide is a guardian of the pH of the blood, which is essential for survival.

Explanation:

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