Hydrochloric acid is secreted by which of the secretory cells of the stomach?
a. chief cells
b. parietal cells
c. serous cells
d. mucous neck cells

What are some aquatic organisms that live in cold water temperatures?

Which group is noted for the independence of gametophyte and sporophyte generations from each other? a) ferns b) mosses, hornworts, and liverworts c) charophytes d) angiosperms e) gymnosperms

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased