In Figure 55-2, the gull has the highest concentration of DDT because it is:
a. a more complex organism.
b. an older organism.
c. at the bottom of the food chain.
d. at the top of the food chain.
e. homoeothermic (warm-blooded). What will be an ideal response?
D
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Short repeated sequences of DNA that vary in number from one chromosome to the next are called:
A. variable number tandem repeats. B. restriction fragment length polymorphisms. C. single nucleotide polymorphisms. D. copy number variants.
Which of the following are not part of the shoot system?
A. leaves B. stems C. flowers D. roots E. fruits
The prolonged low temperature exposure required for the germination of some seeds:a
is typical of coconuts. b. provides an alternative to the process of imbibition. c. prevents them from growing in flooded, anaerobic soils. d. allows the seeds to conserve limited food stores. e. ensures that the seeds germinate in spring, rather than in winter
What is one of the functions of nucleic acids?
A) They transmit genetic information. B) They help produce energy within the cell. C) They regulate the flow of materials into the cell. D) They energize chemical reactions within the cells.