What is a factor that drives animal migration?
A. seasonal availability of food
B. nest availability
C. hunting pressure
D. intraspecific competition
E. tidal patterns
A. seasonal availability of food
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An organized unit of DNA sequences that enables a segment of DNA to be transcribed into RNA and ultimately results in the formation of a functional product is called a _______.
A. chromosome B. trait C. allele D. gene E. expression
The organelle responsible for harvesting light as an energy source for photosynthesis is the
A. kinetoplast. B. mitochondrion. C. centriole. D. chloroplast.
Which of the following is a benefit of chemical diversity to humans?
a. Increased soil productivity b. Potential pharmaceutical and medical discoveries c. Larger number of distinct species d. Genetic diversity in crops used in commercial agriculture
Which of the following are NOT phototrophic bacteria?
a. heliobacteria b. purple sulfur bacteria c. sulfur-oxidizing bacteria d. cyanobacteria