Chloroplast ATP synthases are powered by the flow of protons from the:
A. thylakoid lumen to the stroma.
B. stroma to the intermembrane space.
C. intermembrane space to the cytoplasm.
D. stroma to the thylakoid lumen.
E. thylakoid lumen to the intermembrane
space.
A
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Wheat is a group of grass species. Cultivation originated in the eastern Mediterranean about 10,000 years ago
In comparison to closely related wild grasses, cultivated wheat has shorter stalks and fewer, larger seeds that are firmly attached to the stalk and are unable to disperse via wind like other grasses. Which of the following provides an explanation as to why wheat is so successful despite the loss of seed dispersal? A. Wheat seeds are dropped below the parent plant and will grow the following season. This maintains the worldwide distribution of wheat. B. Wheat seeds are collected and dispersed by humans. Their worldwide distribution increases every time a new field of wheat is planted. C. Wheat seeds have evolved to be consumed by animals. Wheat seeds no longer rely on wind as its dispersal mechanism. D. Wheat seeds are not required for reproduction. Because it is a grass species, it has asexual reproduction.
Lichens are used by scientists as an indicator of pollution because they
a. require nonpolluted water to grow. b. are extremely sensitive to sulfur dioxide. c. react to small amounts of carbon monoxide. d. are very sensitive to ultraviolet radiation. e. respond to increased levels of chlorofluorocarbons.
If more individuals move out of a forest than into it every year, the ________ rate is high
A) immigration B) fidelity C) emigration D) migration
What is another name for sexual intercourse?
What will be an ideal response?