What do the larvae of echinoderms indicate about the evolution of echinoderms?

You're purchasing the meat of a two-year-old sheep from the butcher. Your chef says this meat is lamb. The butcher says the meat is referred to as mutton. Who is correct? A. Neither the chef nor your butcher is correct. B.

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

Why does someone who has lactose intolerance have gastrointestinal problems, such as abdominal distension, gas, cramping, and diarrhea? question 4 options: the lactose is an irritant to the stomach.

How is the geologic time scale different from time scales that show human activities or accomplishments? A. The units of geologic time are much shorter. B. The geologic time scale shows events in chronological order. C.

If a body's rectal temperature cannot be taken, what other location can be used?

Uit flies are commonly used in genetic investigations that focus on traits passed from parents to offspring over several generations. What can you infer is the reason fruit flies are the most commonly used organism for this type of investigation?

5 potential causes of Microevolution

Delia is interested in finding ways to cure diseases. Which of the following career fields would best suit Delia's interest? animal biology cytology nuclear biology zoology

The purpose of a mordant in the Gram stain is to: make gram-negative cells visible. prevent the crystal violet from leaving the cells. make the flagella visible. make the bacterial cells larger. remove the simple stain.

Nicolas Steno (1638-1686) recognized that fossilized shark teeth were formed from actual prehistoric shark teeth.