Help asap only 1 and 3

1. Differences in air pressure cause movement in the air, which creates wind

3. As the air cools it becomes more dense and falls to the earth's surface

Explanation:

hope this helps :)

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.

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek