Amoebas use extensions of their cell membrane (called pseudopodia) to move, as well as, to engulf food. When the pseudopodium traps a bit of food, the cell membrane closes around the meal. This encasement forms a food vacuole. Hope this helps.
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:
Explanation:
DNA guides the formation of an organism’s structures. DNA helps organisms function by telling them how to function.
DNA plays a role in the growth and reproduction of organisms.
Answer: , 12<span>
a cell with a diploid number of 24 undergoes meiosis, how many chromosomes are in each daughter cell?
Mitosis<span>-creates two cells (one division)
-creates body cells
-makes sexual cells
-no crossing over
-daughter cells are diploid</span>
Meiosis<span>-creates four cells (goes through two divisions)
-daughter cells are haploid
-somatic cells
-crossing over happens
-haploid</span>
</span>
