Answer:
active transport
Explanation:
it involves movement of ions
Boy you are off the charts gorgeous, I would rate you a 69
Umm well from my studies shown that its extintion
Pollution and deforestation
Answer:
Some of the hydrogen bonds with other elements, but most of it remains free hydrogen. Both hydrogen and helium are light elements, so they will tend to evaporate into space over time. ... But the gravity of Earth isn't strong enough, so Earth's early atmosphere of helium and free hydrogen evaporated into space.
Explanation: