Studies have shown that in the flowering plant Arabidopsis the development of parts of a flower is
governed by
a. differential uptake of hormone signals from the leaves.
b. the oxygen gradient from outside to inside of the closed flower.
c. differentiation of cell types as they are formed from the apical meristem.
d. the timing of cell division.
e. the expression patterns of several floral organ homeotic genes.
E
You might also like to view...
The part of the stomach designated by the letter “A”
in the above figure is called a. pyloric sphincter. b. esophagus. c. mucosa. d. duodenum. e. none of these.
A study of the genomes of dogs from around the world indicated that:a
all dogs appeared to develop from a mixture of wolf and coyote. b. all dogs appeared to evolve from a mixture of the jackal and the wolf. c. all dogs appeared to evolve from a mixture of the wolf, jackal, and the coyote. d. some dogs evolved from the coyote and some from the wolf. e. the dogs’ closest relative is the gray wolf
The second law of thermodynamics states that
a. energy can be transformed into matter, and because of this, something is obtained for nothing. b. energy can be destroyed during nuclear reactions such as those that occur inside the sun. c. if energy is gained by one region of the universe, another place in the universe also must gain energy in order to maintain the balance of nature. d. energy tends to flow from concentrated to less concentrated forms. e. none of these is true
Overgrowth of the skin bacterium Proprionibacterium acnes may lead to ________.
A. rash B. bloodstream infection C. body odor D. warts