2
The 1988 fires of Yellowstone
National Park cleared large areas of
vegetation, leaving nothing but soll
intact. When life returns to a
previously established community
such as Yellowstone, this process is -
F primary succession
G
H
J
biodiversity
secondary succession
speciation

secondary succession

Explanation:

secondary succession is when a plants and animals return to a previously inhabited area that was significantly altered by a disturbance

the calvin cycle has three stages. in stage 1, the enzyme rubisco incorporates carbon dioxide into an organic molecule. in stage 2, the organic molecule is reduced. in stage 3, rubp, the molecule that starts the cycle, is regenerated so that the cycle can continue

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.