Which of the following best describes the purpose of the Nucleus to store the genetic information and is the control center of the cell

to release energy by breaking down food molecules

to transport nutrients into and out of the cell

to protect the cell from microorganisms

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity