50. Long answer questions I

 

a. Which of the following animals has great diversity and appears to have evolved from diverse origins?

 

b. The presence of a fluid-filled sac around the embryo during its development is called ________.

 

c. Which of the following are the three groups of Amniotes?

 

d. The geographical isolation of species leads to new organisms being formed. The splitting of existing species into two new species, and their geographical isolation, is causing _________.

e. Geographical barriers isolate the newly formed groups. This prevents inter-relationships between different species. That is why the gene pool of the population section is isolated from rest and causes new species to be formed.