A horizontal stem modified to penetrate the substrate and anchor a plant is a ____
a. vascular system
b. protonema
c. sporangium
d. rhizome
e. shoot system
D
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Indicate whether this statement is true or false.
Endangered species
A. will become extinct in the next 50 years. B. are likely to be in danger of extinction in the future. C. are those species found only in zoos, aquaria, and museums. D. are mainly found in the tropics. E. are in danger of extinction throughout all or most of their range
The state of torpor caused by lack of food or water during periods of high temperature is called:a
acclimatization. b. hibernation. c. conformation. d. estivation. e. migration
What would be the consequence if one base were changed in the base sequence of a DNA molecule?
A) Messenger RNA would correct the mistake. B) Protein synthesis would stop. C) Genome copying would be impossible. D) A defective protein could be produced.