An animal with a brain and a single ventral solid nerve cord is the

A. planarian.
B. cat.
C. hydra.
D. earthworm.
E. octopus.


Answer: D

Biology & Microbiology

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Cnidarians evolved from an ancestral group of

(a) sponges. (b) protists. (c) fungi. (d) plants.

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Which of the following statements is true regarding the RNA of plant viruses? Select all

A. Outside of replication, the RNA of plant viruses is typically single-stranded. B. Outside of replication, the RNA of plant viruses is typically double-stranded. C. Plants cleave viral double-stranded RNA to form small-interfering RNAs. D. Plants cleave viral single-stranded RNA to form small-interfering RNAs. E. Plant viruses contain only single-stranded DNA, not RNA.

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What are the products of the hydrolysis of ADP?

a. ATP, a water molecule, and free energy b. ATP, an inorganic phosphate ion, and free energy c. AMP, an inorganic phosphate ion, and free energy d. AMP, a water molecule, and free energy

Biology & Microbiology

Twin spotting provides evidence of what genetic event?

A) meiotic recombination B) mitotic recombination C) linkage D) mutation E) biological evolution

Biology & Microbiology