The three domain system arose when scientists grouped organisms according to how long they have been

a. alive in their present forms
b. going extinct
c. evolving independently
d. using DNA to store information


c. evolving independently

Biology & Microbiology

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Answer the following statements true (T) or false (F)

1. Two species that occupy identical realized niches will not be able to co-exist for an extended period of time. 2. Chemical defenses are found only among animals. 3. The mimicry of coral snakes by scarlet king snakes is an example of Batesian mimicry. 4. Fleas are endoparasites.

Biology & Microbiology

Scientists have studied atmospheric conditions over the last century and have noted that the

atmospheric carbon dioxide level has __________ and global temperatures have __________.

a. decreased; decreased b. decreased; increased c. increased; decreased d. increased; increased

Biology & Microbiology

Two members of the same species compete for a limited resource, resulting in equal sharing of the limited resource

What is this called? a. interspecific scramble competition b. intraspecific scramble competition c. interspecific contest competition d. intraspecific contest competition e. density-independent competition

Biology & Microbiology

Explain the concept of selective toxicity.

What will be an ideal response?

Biology & Microbiology