Answer:
third and fourth trophic levels
Explanation:
Answer:
Ca has 20 protons, so neutral it would have 20 electrons, but according to the charge, 2 electrons have been lost.
Explanation:
Answer:
A/D
Explanation:
D, Fertilizers put more sulfur in the ground than their should be.
A, fossil fuels, could also be the answer. When we combust fossil fuels we release the sulfur in them into the atmosphere when they should not be in the air.
Answer:
Penguins can stay warm in cold arctic waters. It is likely the most result of an organism having lipids in its body since fats , other term for lipids, provides energy and stores it.
