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A scientist is attempting to build a cladogram that shows the evolutionary closeness of three organisms in relation to humans.

After doing DNA analysis, they determine that the organisms share the following percentages of DNA:
Organism A and humans share 85% of their DNA.
Organism B and humans share 80% of their DNA.
Organism C and humans share 90% of their DNA,
Based on this information, which order should they go on the cladogram (from least related to most related)?
(1 point)
O A, B, C, humans
OB, A, C, humans
o C, B, A, humans
OC, A, B, humans

User Bytebender
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4.1k points

2 Answers

6 votes

Heyo! ;D

So, just to give you a heads up, these do change and sometimes vary for some, however please make sure before you look into these. Thanks! Just pre-warning!

1. The two organisms that are the most closely related would be:

~A and C~

2. Based on the information of percentages of DNA, the order they should go on the cladogram (from least related to most related) would be:

~B, A, C, humans~

3. The evidence that would support the relationships shown on the graph between amphibians, reptiles, birds, and mammals would be:

~Mammals have more genes in common with birds than with amphibians.~

4. The piece of evidence, if true, that would most likely weaken the hypothesis that humans and chimpanzees have a common ancestor to gorillas would be:

~The cells of the eye on embryos of gorillas and humans follow a similar pattern of development while chimpanzee embryos are different.~

5. The similarity of the structures of the forelimbs of bats and humans are known as:

~homologies~

because they result from species evolving:

~from the same common ancestor~

6. The suggestion above discussing the fact "all vertebrate embryos have a tail and gill slits at some point during embryonic development" helps to suggest that:

~These species share a common ancestor.~

7. The conclusion that can be made based on the statement "Fossil A is found closer to the surface compared to Fossil B." would be:

~Fossil B is most likely older than Fossil A.~

8. The statement that could be used to explain the similarity of the developmental process of vertebrate embryos would be:

~All vertebrates develop a backbone that protects the spinal cord.~

9. The term for the remains, imprints, or traces of living things from a previous geological age would be:

~Fossils~

10. The reason some mutations, or changes in the sequence of DNA, don't have any effect on the characteristics of the organisms would be:

~The mutated sequence still codes for the same amino acid.~

11. What is typically studies when analyzing not-yet-born (or unhatched) animals is:

~embryological development.

12. What scientists can analyze to get a better understanding of how plants and animals evolved from a common ancestor is:

~DNA molecules~

13-16. The rest of the questions are written responses, 13-15 being short answers and the last being a single 3-5 sentence response. But no fear! These are rather easy ones to do by yourself. Or, if you really need help, I found a lot of really helpful responses on here. Anyways, good luck!

User Ruiquelhas
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3.9k points
4 votes

B, A, C, Humans is the correct answer

User Heremyas
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4.6k points