Science

1. Which of the following explains why a bone in a birds wing is homologous to a bone in a lizards front leg?
A. the bones in the two species provide for the same type of motion.
B. the bones in the two species are both vestigial structures.
C. the two species were exposed to the same environmental pressures.
D. the two species have a common ancestor.*

2. A portion of the amino acid sequence of an enzyme from a worm is shown below:

-Q-Q-Q-N-N-N-C-C

Analyze the same portion of the same enzyme taken from several other organisms. place them in order from most closely related to the worm to most distantly related to the worm.

-Q-R-Q-N-S-S-C-C- organism X

-Q-Q-Q-N-N-S-C-C- organism Y

-Q-Q-R-N-S-N-C-C- organism Z

A. Z,Y,X
B. Y,Z.X*
C. X,Z,Y
D. Y,X,Z

3. Which experimental approach would be the most effect and easiest to clearly determine the evolutionary relationship between these two organisms?

A. Sequence the same gene in both species to compare their similarity.*
B. Dissect specimens of both species to look for homologous structures.
C. Search fossil databases to locate a common ancestor.
D. Evaluate cells from both species to determine whether they contain enzymes.

4. Study the wings of the bird in the two images below. Which of the following words applies to only one of the wings structures represented in this pair of species?

A. Homologous
B. Developmental
C. Vestigial*
D. inherited

My answers:
1. D
2. B
3. A
4. C

Can someone please check my answers?

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  1. relook at 2. I have no idea on 4

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    👤
    bobpursley
  2. ok thx

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  3. 1. D
    2. B
    3. A
    4. C

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  4. Hal is 100% correct!

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  5. Nice!

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  6. Thanks Hal!

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  7. Np guess here to help

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  8. Here
    1. D
    2. B
    3. A
    4. C

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  9. Here
    1.D
    2.B
    3.A
    4.C

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  10. the first one is multiple choice

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  11. 100% Thanks Hal!

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    2. 👎
  12. Hal is correct 2021

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  13. OKEEH ✨

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    2. 👎

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