In a DNA double helix, the phosphates are bonded to
A. phosphates.
B. ribose.
C. deoxyribose.
D. uracil.
C. deoxyribose.
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In eucaryotic cells, what are the sites of photosynthesis?
A) mitochondria B) plasmids C) plastids D) ribosomes
An adventitious root is indicated by
a. A. b. B. c. C. d. B and C. e. none of these.
The structure at letter "B" is the ____ which ____
a. tongue; produces speech b. epiglottis; closes the larynx c. larynx; produces sound d. epiglottis; closes the esophagus e. pharynx; holds the trachea open
Which of the following statements about the abnormal mucous production associated with cystic
fibrosis is NOT correct? a. The mucus blocks the action of the cilia that line the bronchi. b. The mucus promotes the growth of dangerous bacteria in the respiratory system. c. The mucus is in the respiratory system is abnormally viscous. d. Abnormal mucous secretions occur throughout the body systems. e. Abnormal mucous secretions inhibit infections by bacteria.