One kind of vaccine consists of a solution containing ________
A) antibodies
B) horse serum
C) B cells
D) a harmless variant of a disease-causing microbe
D
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A certain species of pine tree survives only in scattered locations at elevations above 2800 meters in the western United States. To understand why this tree grows only in these specific places, an ecologist should _____
A) conclude that lower elevations are limiting to the survival of this species B) study the anatomy and physiology of this species C) investigate the various biotic and abiotic factors that are unique to high altitude D) analyze the soils found in the vicinity of these trees, looking for unique chemicals that may support their growth E) collect data on temperature, wind, and precipitation at several of these locations for a year
A gene pool is
A. the genes that are unique to a species. B. all the genes in a population. C. all the similar genes in a gene family. D. a swimming hole for geneticists. E. a group of species that look alike but are not located in the same area at the same time.
The synthesis of an RNA molecule from a DNA
template strand is a. replication. b. translation. c. transcription. d. DNA synthesis. e. metabolism.
What is incorrect about the ostrich?
a. It weighs over 300 pounds. b. It is featherless. c. It is flightless. d. It has a four-chambered heart. e. It is a runner.