Acetylcholine binds this membrane protein, which subsequently opens to allow sodium to enter the cell. Acetylcholine exerts its effect on what type of transport protein?
A. ligand-gated channel
B. voltage-gated channel
C. mechanosensitive-gated channels
D. regulatory protein-gated channels
E. stretch-sensitive gated channels
A. ligand-gated channel
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A gene that, when mutated, leads to organisms with structures in abnormal places is termed
A. vestigial. B. dominant. C. homeotic. D. parsimonious. E. homologous.
What key advantage do angiosperms have over gymnosperms?
A. Angiosperms go through alternation of generations. B. The angiosperms can produce spores which are more stable than seeds from gymnosperms. C. Angiosperms produce pollen and do not require water to reproduce. D. Angiosperms can produce flowers and fruits to aid in seed dispersal. E. Angiosperms have a vascular system, which allowed them to grow taller.
Mutations resulting from exposure to physical or chemical agents are called ________ mutations.
Fill in the blank(s) with the appropriate word(s).
Which of the following would allow optimal population growth?
a) unlimited resources b) accumulation of waste products c) predation d) competition e) limited access to food and water