Desert plants often have ________ in their seed coats that keep them dormant until there is enough rain to complete their life cycle
A) digestive enzymes
B) cold-sensitive compounds
C) drying agents
D) water-soluble chemicals
E) wetting agents
D
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Both DNA replication and PCR require: (check all that apply)
_____ DNA polymerase. _____ DNA helicase. _____ a DNA template. _____ a thermocycler machine. _____ plasmid DNA.
Most of an herbaceous plant body consists of
a. ground tissue. b. phloem. c. vascular tissue. d. sclerenchyma. e. xylem.
Plague exhibits a
A. bubonic form in which swollen lesions termed buboes develop. B. pneumonic form that manifests as a respiratory disease. C. septic form historically called the Black Death. D. All of the choices are correct.
Which statement best represents the difference between ectotherms and endotherms?
a. Ectotherms rely on homeostatic mechanisms to maintain body temperature. b. Ectotherms have a very high daily energy expenditure. c. Endotherms rely on behavior modification to maintain their body temperature. d. Ectotherms derive heat from metabolic processes. e. Ectotherms animals outnumber endotherms.