The only extant seed plants that have swimming sperm are the ____
a. cycads
b. ginkgos
c. conifers
d. cycads and ginkgos
e. cycads, ginkgos, and conifers
ANSWER: d
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_______________ are chemical substances produced in small quantities in one part of an organism and then transported to another part of the organism, where they bring about physiological responses.
A. Glycoproteins B. Photosynthates C. Hormones D. Heat shock proteins E. Pulvini
Lysosomes are specialized ____
a. ribosomes b. vacuoles c. Golgi bodies d. vesicles e. plastids
Using retroviral vectors for gene therapy might increase the patient's risk of developing cancer because they might _____
A) introduce proteins from the virus B) not express the genes that were introduced into a patient's cells C) not integrate their recombinant DNA into the patient's genome D) integrate recombinant DNA into the genome in ways that misregulate the expression of genes at or near the site of integration
Defense of an area that contains important resources for survival is termed
A) appeasement. B) kinesis. C) passive behavior. D) territoriality. E) aggression.