What is the most common class of molluscs?

a. Chitons
b. Gastropods
c. Bivalves
d. Cephalopods


Ans: b. Gastropods

Biology & Microbiology

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Which of the following is a change to the nucleotides in a segment of DNA that codes for a protein?

a. Proto-oncogenes b. Tumor suppressor genes c. Gene mutations d. Negative regulators

Biology & Microbiology

What distribution pattern is the most common in the natural world?

a. random b. uniform c. clumped d. stratified or layered e. bimodal

Biology & Microbiology

What is the importance of the structure of the

small intestine?

a. The many folds help to mechanically break down food. b. The many folds help to increase the surface area for digestion and absorption. c. The many foods help to slow the food down as it moves through the small intestine. d. choices a, b, and c are all correct. e. none of these are correct

Biology & Microbiology

The membrane of a resting neuron is most permeable to which of the following ions?

A. Cl- B. K+ C. H+ D. Ca2+ E. Na+

Biology & Microbiology