All types of internal fertilization require

A. specialized anatomical structures.
B. physical joining of male and female.
C. transfer of a spermatophore to the female reproductive tract.
D. a terrestrial environment.


A. specialized anatomical structures.

Biology & Microbiology

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The venom of black widow spiders (Latrodectus mactans) contains an enzyme that hydrolyzes lecithin to the phospholipid lysolecithin. The lysolecithin lyses red blood cells, destroying them. One possible mechanism whereby lysolecithin disrupts the plasma membranes of red blood cells is that it

A) is toxic to red blood cells. B) may act in a manner similar to detergents. C) binds calcium ions, compromising membrane integrity. D) acts as a second messenger to stimulate apoptosis. E) None of the above is a possible mechanism.

Biology & Microbiology

List the 3 major groups of baleen whales and give their major features

What will be an ideal response?

Biology & Microbiology

Dark-colored solid surfaces

a. have a heating effect on their surroundings. b. have a cooling effect on their surroundings. c. release carbon dioxide. d. increase evapotranspiration.

Biology & Microbiology

An enzyme reduces the free energy of which of the following?

A) substrate B) product C) transition state D) cofactor E) intermediate product

Biology & Microbiology