Which of the following molecules can be used as a substrate for cellular respiration?

a. glucose only
b. glucose and lipids only
c. glucose and proteins only
d. glucose, lipids and proteins only
e. glucose, lipids, proteins and fatty acids


E

Biology & Microbiology

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Compact bone tissue is located in the area

indicated by a. A. b. B. c. C. d. D. e. E.

Biology & Microbiology

During childbirth, the hormone oxytocin stimulates the smooth muscles of the uterus to contract; however, smooth muscles lining the digestive tract are not affected by oxytocin. Which statement correctly explains this scenario?

A) Oxytocin is released by the fetus and diffuses into the amniotic fluid inside the uterus. Therefore, only uterine muscles are stimulated. B) The digestive tract muscles of the mother's body are temporarily paralyzed by the anti-pain medications administered during labor. C) Oxytocin is a local hormone released by the uterus, so other muscles do not receive its signals. D) Smooth muscles of the digestive tract do not contain receptors for oxytocin. E) Endocrine hormones such as oxytocin do not travel through the blood, so they do not make contact with digestive tract muscles.

Biology & Microbiology

Which of the following are used to characterize the evolutionary relationship between

organisms?

a. fossil evidence b. developmental patterns c. molecular data d. observable characteristics e. all of these

Biology & Microbiology

Burrowing deposit feeders favor ____ bottoms

a. muddy b. rocky c. sandy d. cobble e. pebble

Biology & Microbiology