Of the following structures, which one is not a specialized cell of the epidermis?
A. guard cells
B. oil glands
C. sclereids
D. root hairs
E. trichomes
Answer: C
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Which of the following is not taking a toll on the honeybee population in the United States?
a. Predatory wasps b. Pesticides c. Israeli acute paralysis virus d. Neonicotinoids e. Parasitic mites
The operation of natural selection depends
upon the fact that a. the strong always survive, whereas the weak always die. b. some individuals have a better chance to produce more offspring. c. mutations are always harmful. d. acquired characteristics are inherited. e. reproduction of all members of a species is virtually the same.
Instances in which cells die shortly after they are produced in development illustrate:a
morphogenesis. b. mosaic development.
c. apoptosis. d. non-specific differentiation. e. caspases.
Why is chlorophyll green in colour?
a. It can reflect the green wavelength. b. It cannot reflect the red wavelength. c. It cannot reflect the green wavelength. d. It can reflect the red wavelength.