Answer:
severe drought, since other are biotic factors.
Answer:
here.
Explanation:
17. antibiotics
18. reproduction (growth is increase in size and number)
19. cell walls (like penicillin. This mechanism is important because it will not harm the host as human cells don't have cell walls.)
20. 70S ribosomes (because this is where protein synthesis occurs in bacteria)
Answer:
B. Meiosis
Explanation:
Crossing over occurs in meiosis.
