Which statement describes a function of the
hormone estrogen?
(1) it regulates the secretion of digestive
enzymes.
(2) it promotes sperm production in males.
(3) it influences the development of adult sex
characteristics.
(4) it maintains blood sugar levels.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a. one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b. one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c. one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.