Answer:
1. B Prokaryotes lack a nucleus and membrane-bound organelles
2. C glucose
The right answer is <span>Refractory period.
At the moment when the action potential is emitted, the fiber being depolarized, it is impossible to depolarize it again. It is, therefore, necessary to wait until the membrane potential returns to a value below the critical threshold in order to be able to excite it again. We are thus led to distinguish two periods that characterize its excitability.
An absolute refractory period: during which any stimulation, even supraliminal, is ineffective since the fiber is already depolarized.
A relative refractory period: during which a second action potential can be omitted provided that the depolarization produced by the excitation reaches the critical threshold, which implies that it is more important since the value of the resting potential has not been restored yet.</span>
Answer:
Cell division becomes uncontrolled when mutations occur in genes that regulate cell division.
Explanation:
Texture gradient is the change in size which closer objects have compared to objects farther away. It also involves groups of objects appearing denser or more blurry as they move farther away.
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