Why is meiosis important for sexual reproduction? A. It allows gametes to have twice the original number of chromosomes of the organism.
B. It allows the zygote formed from fertilization to have half the original number of chromosomes of the organism.
C. It allows the zygote formed from fertilization to have triple the chromosome number of the organism.
D. It allows gametes to have half the original number of chromosomes of the organism.

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.

Creating new things to solve problems and improve life depends on the close interaction of which two fields?

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.