Question

Organisms that can interbreed and bear fertile offspring are considered to be in the same

A. class.
B. species.
C. order.
D. family.

Answer 1

b. Species

are organisms that can interbreed

Answer 2

B. species.

The organismic hierarchy of organism comes from the highest and lowest order as the following;
1. D Domain
2. K Kingdom
3. P Phylum
4. C Class
5. O Order
6. F Family
7. G Genus
8. S Species

This hierarchy and order helped many taxonomist to determine and classify organisms by a variety of criteria. And it seems that species can breed the same fertile offspring.