The white cliffs of Dover are composed mostly of foraminiferans shells. These organisms move by pseudopodia and feed by phagocytosis. Foraminiferans are an example of which of the following?

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


Answer: a. A protozoa

Biology & Microbiology

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Homologous genes within a species are called paralogs

Indicate whether the statement is true or false

Biology & Microbiology

Which of the following is most likely the result of a neutral mutation?

a. fingerprint patterns b. larger brains c. standing upright d. digestion of cellulose

e. fur

Biology & Microbiology

What is the role of tight junctions in the transport of glucose across the intestinal epithelium?

a. They open and allow glucose to pass between the epithelial cells. b. They keep the Na+-K+ pumps in the apical membrane only. c. They keep the Na+-glucose cotransporter in the apical membrane and the glucose-facilitated transporter in the basolateral membrane. d. They keep the glucose-facilitated transporter in the apical membrane and the Na+-glucose cotransporter in the basolateral membrane.

Biology & Microbiology

What kind of mutation occurs when one base is changed to another at a single location in the DNA?

A) Insertion B) Neutral C) Deletion D) Substitution

Biology & Microbiology