One redo our could be a body of water like a dam as such, and another is something like a retention pond, taking in water
Answer: genetic variation
Answer:
Explanation: It depends can the electricity be produced with solar power
or wind power. If fossil fuels are only way to replace power produced by
hydroelectric power, it is not advisable not to take it off production.
Somewhere certain stairs or bypasses are done to fishes which are going upstream.
Answer: facilitate the transport of substances across a cell membrane.
Explanation: