Which of the following best describes a species?
a. organisms that can reproduce infertile, nonviable offspring
b. organisms that can breed and produce viable and fertile offspring
c. organisms that live in similar habitats
d. all of the above are correct.

correct answer: b). organisms that can breed and produce viable and fertile offspring

a species is defined as the group of related organisms that are similar to each other and they are capable of interbreeding with each other in order to produce fertile and viable offspring.

although appearance is important in order to identify the species it does not define the species, an organism may look different and yet they can be the same species.

example: chimpanzee, gorilla, chicken etc.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.