What is the main purpose of cellular respiration?

A) To produce carbon dioxide
B) To produce sugars
C) To produce ATP
D) To produce oxygen


C

Biology & Microbiology

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Mice lacking plakoglobin have skin defects but usually die from

A) cancer. B) muscular dystrophy. C) heart failure. D) Ehlers–Danlos syndrome. E) scurvy.

Biology & Microbiology

What is the likely explanation for the extinction of dinosaurs?

A. Lightning storms started massive fires. B. The earth was suddenly flooded with water. C. There was a severe drought. D. A meteor struck the earth, sending clouds of soot that blocked the sunlight.

Biology & Microbiology

_________ is a nutritive tissue composed of triploid cells in the seeds of flowering plants.

A. Phloem B. Sepal C. Microspore D. Megaspore E. Endosperm

Biology & Microbiology

In addition to breaking down food, what other valuable function does stomach acid perform?

A) Stomach acid converts waste molecules into bile. B) Stomach acid recycles chlorine. C) Stomach acid activates enzymes in the small intestine. D) Stomach acid kills bacteria and other pathogens in food.

Biology & Microbiology