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Which of the following is not a disadvantage of sexual reproduction?
Organisms have a lower survival rate due to lack of genetic variation.
Organisms have to wait until developed to reproduce.
Organisms may be exposed to harsh environments searching for mates.
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Organisms cannot continue reproduce during a pregnancy.
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Organisms have to wait until developed to reproduce.

Explanation:

There are two forms of reproduction: asexual and sexual. In asexual reproduction, an organism can reproduce without the involvement of another organism. ... The cloning of an organism is a form of asexual reproduction. By asexual reproduction, an organism creates a genetically similar or identical copy of itself.

heat a spark and oxygen

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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