Answer:
It would be the plant type
Explanation:
This is because you are measuring the growth of 2 different plants, so they can not be the same. all the other options ARE constants
Cells, tissues, organ, and body system.
A car
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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
Organelles(or-gahn-lś)
Specifically means little organ but is sometimes commonly used as the Rank below the tissue in the cell body..They live inside the cell taking care of most of our bigger organisms. :)
