Question 1 (1 point) 1. The arctic tundra is a fragile ecosystem. Use the pictures and descriptions in section 2 to answer the following:
Based on your observations of the ecosystem, which of the following characteristics is TRUE about the fragile tundra
ecosystem?
A. The ecosystem has more species than any other ecosystems.
Оа
Ob
B. The ecosystem has many kinds of species that live under the water.
ос
C. The climate is harsh, which limits the number of species that can live there.
Od
D. There are large predators like the polar bear that rarely impact the ecosystem.
Question 2 (1 point)
Take a look at the man below It shows the diversity and scale of terrestrial
blone

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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the animal that would be cutest if scaled down to the size of a cat? elephant

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

burning fossil fouls really decrease the carbon in the atmosphere so b