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
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Cnidarians evolved from an ancestral group of
(a) sponges. (b) protists. (c) fungi. (d) plants.
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.
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
Twin spotting provides evidence of what genetic event?
A) meiotic recombination B) mitotic recombination C) linkage D) mutation E) biological evolution