Answer:
a) irrigation system b) cloud seeding
Explanation:
- like a hose or line that distributes water where needed and cloud seeding is flying aircraft to a cloud that has little rain droplets already present and it shoots salt flares into the cloud to enhance rainfall
Adequate supply of food
absence of predators
Trisomy=3 chromosomes; 1 more than the required pair (2)
21=the type of chromosome
So, here we can eliminate A and B.
Now we have C and D.
I know that when sperm cell(s) simultaneously fertilize [an] egg, a class of identical twins will form. Therefore, we can eliminate D, leaving us with merely C. Henceforth, C is your final answer.
What on earth, please repeat the question clearer
