The correct answer would be phenotypic variation.
Answer:
except natural killer cells.
Explanation:
The Helper T cells produce cytotoxic T cells and help B cells, but not natural killer cells
B osmosis is simplified by water dissolves stuff
The peas haven't start germinating, which means no leaves. They can't undergo photosynthesis to produce oxygen. At this stage they are still undergoing respiration, which produce carbon dioxide.
I can’t see the image but CO2 is produced in the mitochondria during respiration
The mitochondria looks like this:
