To keep the body's internal environment in balance c) to make room for nutrients coming in d) to reduce unpleasant
It began 3.5 billion years ago
Answer:
OB. Run-off from fertilized land increases nitrogen levels in ecosystems and encourages algal growth. is the correct answer.
Explanation:
because This in turn is leading to global warming and weather changes.
They both transport ions, sugars, and salts across the membrane
The sun is the ultimate source
