Hurry please Can cells that are haploid (single set of chromosomes) undergo meiosis?
1. Yes, haploid cells have a single set of chromosomes that can be altered.
2. No, haploid cells have only one set of chromosomes that cannot be reduced.
3. No, haploid cells have only one set of chromosomes that can be multiplied.
4.Yes, haploid cells have a single set of chromosomes that can be transferred.

Haploid cells cannot undergo meiosis because haploid cells have only one set of chromosomes that cannot be reduced (option 2).

Explanation:

Meiosis is the process of reductional cell division in which, from a diploid cell, four haploid cells —called gametes— are obtained.

The process of meiosis comprises two successive divisions, meisosis I and II, with the result explained above.

The haploid cells are the final result of the complete meiosis process, necessary for procreation in species with sexual reproduction, and cannot undergo a process of reductive division.

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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explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.