How do human beings contribute to the phosphorus and sulfur cycles?
a. deforestation

b. planting trees and shrubs

c. adding chemical fertilizers to the soil

d. introducing fish species to ponds and lakes

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

Twind is considered to be an abiotic factor because it.?

The first three phases of the cell cycle are collectively known as (1 point) play audio cellular respiration. telophase. mitosis. interphase.