Which substance is not a biofuel?

a. Alcohols
b. Gases
c. None of these are biofuels

d. All of these are biofuels.
e. Oils


d

Biology & Microbiology

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Skin and mucous membranes

A. are the first line of innate immunity. B. are the first line of adaptive immunity. C. act as physical barriers to infection. D. contain antimicrobial secretions. E. are the first line of innate immunity, act as physical barriers to infection, AND contain antimicrobial secretions.

Biology & Microbiology

Intertidal chitons and snails use the ____ as a means of attachment to the rocks

a. foot b. mantle c. visceral mass d. head e. radula

Biology & Microbiology

Which of the following are NOT seed-bearing

plants? a. cycads b. ferns c. ginkgos d. angiosperms e. conifers

Biology & Microbiology

Malaria is caused by Plasmodium falciparum, a non-motile protist that contains a cluster of microtubules at one end of the cell. Once injected into the blood stream, these microtubules are used to attach to red blood cells. Plasmodium falciparum is which of the following?

a. A protozoa b. An algae c. A slime mold d. A diatom e. An apicomplexan

Biology & Microbiology