WILL MARK YOU BRAINLIEST!

Below .

I hope the information give below is helpful .

Explanation:

In question 1 ;

The independent variable is the fertilizer

The dependent variable should be the rate of growth of the plants

The constant doesn't change so other factors that affect plant growth and health, such as soil quality and watering, would need to remain constant.

The controlled variables might be things such as the the quality of soil and the amount of water given to the plants. If these factors were not constant, and certain plants received more water or better soil than others

The experiment in question 1 is a controlled experiment

The part of the garden that didn't receive fertilizer is the control group

According to the question; She didn't hypothesize .

In question 2 '

The independent variable is the floor wax

The dependent variable was protecting the floor tiles against scratches.

It is a controlled experiment but there's no much information to determine if there is any variability and repetition )

The sections that received no wax is the control group

There is no hypothization (if that's a word :) ).The shopping mall didn't hypothesize (maybe that the tough steel would be better )

I'm not sure of any constant needed  when applying floor wax.

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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c should be the answer