Energy in ecosystems must be continuously supplied by the sun as the warmth from the sun allows plants to grow plus photosynthesis depends on the sun's energy also. Animals also depend on the sun for warmth to survive (or else hibernate). Also, the sun powers the water cycle, the carbon cycle and the nitrogen cycle
The<em> cell membrane</em> controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
Answer:
A molecule is two or more atoms bonded together to form a single chemical entity.
Answer:
The most obvious one is that asexual reproduction is where an organism gives birth by itself. Normal reproduction includes two organisms mating.
I know nothing else.
