Helper T cells become activated by interacting with antigen presenting cells. and the second blank space is either cytotoxic t cells or B cells
Answer: It converts carbon to oxygen
Explanation: During photosynthesis, plants create glucose and oxygen molecules
Answer:
Electron microscope
Explanation:
Instead of using light, it utilized a beam of electron for illumination. Because an electron beam has a shorter wavelength than light (up to 100, 000 times shorter), they have a higher resolution power and are therefore able to view sub-cellular structures including DNA.
Because they are autorotrophs(they make their own food)so most organisms depend on them.