The directional growth response of plants to touch is called
A. phototropism.
B. thermotropism.
C. photoperiodism.
D. gravitropism.
E. thigmotropism.
Answer: E
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How does jasmonic acid contribute to the activation of the wound response in tomato plants?
A. It moves through the phloem of the plant until it reaches the wound site. B. It produces a polypeptide that binds with membrane lipids. C. It binds to enzymes in the gut of the predator. D. It increases the energy available for the plants to fight the predator. E. It signals gene expression, leading to the production of a proteinase inhibitor.
Angelman syndrome is associated with a deletion in a paternal chromosome or presence of two maternal chromosomes.
Answer the following statement(s) true (T) or false (F)
The cytoskeleton ____
a. extends between the nucleus and the plasma membrane b. is found within the nucleus c. is associated with only certain cell structures d. is found within organelles e. is found in all animal cells but not in cells with cell walls
Which of the following can cross the plasma membrane because of its selective permeability?
A. large, nonpolar molecules B. glycoproteins C. gases such as oxygen and carbon dioxide D. large, polar molecules E. ions