Descent with Modification Video Lessons

Concept

# Problem: Currently, two extant elephant species (X and Y) are placed in the genus Loxodonta, and a third species (Z) is placed in the genus Elephas. Thus, which statement should be true?a. Species X and Y are not related to species Z.b. Species X, Y and Z share a common ancestor, but nothing more can be claimed than this.c. Species X and Y are the result of artificial selection from an ancestral species Z.d. Species X and Y share a greater number of homologies with each other than either does with species Z. e. Species X and Y share a common ancestor that is still extant (in other words, not yet extinct).

###### Problem Details

Currently, two extant elephant species (X and Y) are placed in the genus Loxodonta, and a third species (Z) is placed in the genus Elephas. Thus, which statement should be true?

a. Species X and Y are not related to species Z.

b. Species X, Y and Z share a common ancestor, but nothing more can be claimed than this.

c. Species X and Y are the result of artificial selection from an ancestral species Z.

d. Species X and Y share a greater number of homologies with each other than either does with species Z.

e. Species X and Y share a common ancestor that is still extant (in other words, not yet extinct).

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Descent with Modification concept. You can view video lessons to learn Descent with Modification. Or if you need more Descent with Modification practice, you can also practice Descent with Modification practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofCurrently, two extant elephant species (X and Y) are placed ...as medium difficulty.

How long does this problem take to solve?

Our expert Biology tutor, Kaitlyn took 7 minutes and 29 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Schul's class at MIZZOU.