Answer:
Antonie van Leeuwenhoek used single-lens microscopes, which he made, to make the first observations of bacteria and protozoa. His extensive research on the growth of small animals such as fleas, mussels, and eels helped disprove the theory of spontaneous generation of life.
Explanation:
Answer:
All of the above
Explanation:
Plants in artic deserts, the arctic has too little sunlight for C4 photosynthesis to occur.