Yes because he is only observing the height of the plants and he only changes one variable
Answer: The ocean dissolves carbon dioxide from the atmosphere, and it is used by phytoplankton during photosynthesis.
Answer:
theoder schwann and Rudolph Virchow
Chordates, or members of phylum Chordata, possess a backbone.
Answer: It is an amino acid that cannot be made by the body. It must be obtained from eating certain foods.
Explanation:
