Question

Three islands have three different habitats. Island X has little ground vegetation and a lot of trees. Island Y has a lot of ground vegetation but fewer trees. Island Z has a lot of ground vegetation and many trees. The same species of tortoise lives on all three islands and eats plants. The tortoises cannot travel between the islands. Over time, the population on island Y develops a shorter neck than the populations on the other islands. Which two factors likely contributed to the changes caused by natural selection in this tortoise population?

A. All of the offspring that were born on island Y survived to reproduce.
B. Island Y had more food than is needed by the tortoise population.
C. Mutations and sexual reproduction led to a range of heritable neck length phenotypes.
D. The tortoises competed for plants near the ground, and having a shorter neck was an advantage.​

Answer 1

below!

Step-by-step explanation:

Assuming this is a choose two answer, C & D.

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