A, chloroplast and cell wall.
This is because chloroplasts are what plant cells use to do the process of photosynthesis, which animals do not need. Plant cells also have cell walls.
Yes, Chemical reactions occur slower at lower temperatures and faster at higher temperatures. When you put a glow stick in cold water, the chemical reaction slows down but will last for a longer period of time. When you put a glow stick in hot water, the reaction speeds up but will be over quicker.
Not sure about the variable one though, sorry!
I know how to do punnet squares, but could you show the full question please?
A solar eclipse is when the moon moves between the earth and the sun, so the moon casts a shadow on the earth
