The yellow or orange coloration of some plants is due to pigments stored in
a. central vacuoles.
b. chloroplasts.
c. chromoplasts.
d. leucoplasts
C
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Which of the following are problems associated with intensive irrigation?
I) mineral runoff II) over fertilization III) aquifer depletion IV) soil salinization A) only I and II B) only II and IV C) only I, III, and IV D) only III and IV E) I, II, III, and IV
The first line of plant defense against pathogen infection is(are) the:
A. cuticle. B. plasmodesmata. C. stomata. D. pathogens. E. cell walls.
Darwin's observations of finches from the Galápagos included which of the following?
a. The 13 finch species were descended from a common ancestor. b. The 13 finch species each had differently-shaped bills. c. The 13 finch species had migrated from South America. d. The 13 finch species had different food preferences e. The 13 finch species had similar DNA sequences
The term that describes the diffusion of water is:
A) simple diffusion. B) osmosis. C) equilibrium. D) facilitated diffusion. E) active transport.