23. The answer would be the third option.
24. The answer would be the second option.
Helper T cells become activated by interacting with antigen presenting cells. and the second blank space is either cytotoxic t cells or B cells
False, Geothermal energy is heat from the Earth
The microscope. It allowed for scientists to observe the tiny parts of cells since they are not visible to the naked eye.
Answer:
Things that should be included:
Explanation:
Whether he can accept or deline his hypothesis for the experiment, the data he observed to prove his experiment hypothesis, and the possible errors of his experiment and how it can be improved
