Fertilizer is a chemical or has chemicals in it. When the land being fertilized is near water, the fertilizer is washed into the water harming the water and polluting it. Have regulations such as a distance from the water that land must lay, or the amount of fertilizer you can use can help keep the water clean and unpolluted.
I believe your answer is B :)
Ecologists make models to gain insight into complex phenomena such as the effects of global warming on ecosystems.
hope this helps
Both photosystems contain many pigments that help collect light energy, as well as a special pair of chlorophyll molecules in the heart (reaction center) of the photosystem. The special pair of photosystem I is called P700, while that of photosystem II is called P680.
Answer:
the answer would be the first one which is sexual reproduction
