Weather balloons are often used to make measurements in which "sphere" a. biosphere b. exosphere c. geosphere d. cryosphere e. atmosphere f. hydropsphere

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

the answer is a) cell division.

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