Check my answer?
which of the following best describes a characteristic that distinguishes animals from plants?

select one:
a. plants are photoautotrophs, and animals are chemoautotrophs.
b. plant cells have cell walls containing cellulose, and animal cells lack a cell wall.
c. plants reproduce by binary fission, and animals reproduce sexually.
d. plants digest their food externally, and animals digest their food inside their bodies.

i think its b

The correct answer is B) Plant cells have cell walls containing cellulose, and animal cells lack a cell wall.

Plant and animal cells both are eukaryotic cells. A typical characteristic that distinguishes plant cell from animal cell is the presence of cell wall in plants, which is absent in animal cells.

Cell wall is the outermost layer that surrounds the plasma membrane of the cell in plants. Plant cell wall is made up of cellulose and provides rigidity and structural support to the cell.

Cell wall is absent in animal cells. Only plasma membrane is present in them.

Thus, B) is the right answer.

when it's short and dry.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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