A host race develops when an organism's
a. genes for the host plant choice change.
b. genes for mating preferences change.
c. geographical barriers exist.
d. genes for the host plant choice change and genes for mating preferences change.
e. genes for mating preferences change and geographical barriers exist.
D
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The term herbaceous implies that a plant:
A. is only found in wet environments B. has not developed a secondary or vascular cambium C. probably will live several years D. has no apical meristem E. lacks vascular tissue
The field of genomics refers to
A. the study of an organism's complete genome, including plasmid, mitochondrial, and chloroplast DNA. B. the study of cellular, but not viral, genomes. C. the study of chromosomal DNA. D. the study of an organism's plasmids.
aid in locomotion of some prokaryotes.
A. Cilia B. Flagella C. Glycocalyx D. Pili E. Peptidoglycan
Which of the following could be examples of communication by chemicals?
A. A dog urinating on trees, light posts, fire hydrants, and other objects. B. A rattlesnake injecting poison as it bites its prey. C. A male prairie chicken stamping its feet in a mating dance. D. None of these answers is true.