Climate change and an increasing amount of impermeable surfaces due to urbanization has resulted in:
A. eutrophication.
OB. increased river flooding.
C. the Clean Water Act.
D. the introduction of DDT into the water system.

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root