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

1. Chemical defenses are found only among animals.
2. The mimicry of coral snakes by scarlet king snakes is an example of Batesian mimicry.
3. Fleas are endoparasites.
4. Phoretic species are commensals.


1. FALSE
2. TRUE
3. FALSE
4. TRUE

Biology & Microbiology

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Which one of the following scientists tested the hypothesis that microorganisms can arise by spontaneous generation?

A. Elena and Lenski B. Redi C. Pasteur D. Darwin E. Alvarez

Biology & Microbiology

Inflammation ____

a. is triggered by activated complement b. is a specific immune response c. results in redness due to decreased blood flow d. results in swelling due to the loss of water from damaged tissue e. is caused by fever

Biology & Microbiology

Figure 53-4 is representative of:


a. exponential growth.
b. iteroparity.
c. Type I survivorship.
d. Type III survivorship.
e. Type II survivorship.

Biology & Microbiology

The major cation responsible for regulating actin-myosin contraction is

a. Ca2+. b. H+. c. K+. d. Na+.

Biology & Microbiology