Question

question 1 of 10
which conclusion did darwin draw about the differences between galápagos
domed tortoises and saddleback tortoises?
a. the unique conditions of each island selected for a different set of
traits in the ancestral population of tortoises.
b. domed tortoises could not survive on islands where saddleback
tortoises lived, so they migrated to other islands.
c. unique tortoise species are able to emerge and evolve
independently on islands because there is room to spread out.
d. domed tortoises and saddleback tortoises used their necks
differently and passed the traits to their offspring.

Explanation:

Darwin's theory of evolution by natural selection states that organisms better adapted to their environment survive and reproduce more. Different island conditions (like food availability, habitat) would select for different traits (e.g., shell shape related to reaching food) in the ancestral tortoise population. Option B is incorrect as there's no basis for domed tortoises migrating due to saddleback tortoises. Option C is wrong as evolution isn't just about space. Option D doesn't align with Darwin's natural - selection - based explanation (not just trait - passing due to use).

Answer:

A. The unique conditions of each island selected for a different set of traits in the ancestral population of tortoises.