Chloroplasts. They are only in green plant cells, so, unless you are a green plant, humans and flatworms would not contain them.
Acceleration/ accelerating is how you are increasing speed. Speed as a whole is how fast something goes, acceleration is how something’s speed increases and by how much.
D. before cells without a true nucleus
Necessary because it keeps heat in and keeps the planet at the right temperature for life.
It can harm the planet if more pollution occurs and the greenhouse gas effect traps too much heat and causes global warming
