Which of these algae are used to prepare a medium for bacterial culture? a. red algae b. green algae c. diatoms

A. red algae

Explanation:

A culture medium is the one which can be in the form of liquid or gel supports the growth of living cells. Agar is a jelly like substance or culture medium which is obtain from the red algae belonging to the phyllum of Rhodophyta. It can be used for the growth of microbes such as bacteria and yeast.

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

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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