Which feature if the sun appears in cycles of about 11 years ? A. coronal mass ejuctions B. Solar flares c. Solar wind D. Sunspots

Illustrate, label, and explain how atmospheric carbon and oxygen find there way into a consumer and then back into a producer. include the following terms in your illustration: co2, 02, respiration, photosynthesis, sugar, mitochondria, chloroplast, water, solar radiation

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

What is the next step in muscle contraction after the actin changes shape? (apex)