Lichens
A. cannot reproduce
B. need a nitrogen source to live
C. are parasitic on trees
D. are able to live in extreme environments
D. are able to live in extreme environments
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The chemical bonds of carbohydrates and lipids have high potential energy because:
A. they are strong oxidizing agents. B. they are strong reducing agents. C. their electrons are far away from the nuclei of the atoms. D. they are easy to phosphorylate. E. they are easy to hydrolyze.
Inflammation of the larynx that is usually associated with the common cold or influenza syndromes and that is caused almost exclusively by viruses is:
a. laryngitis. b. laryngotracheobronchitis. c. epiglottitis. d. Vincent angina.
The partial pressure of oxygen is higher in the capillary blood than the interstitial fluid surrounding cells. Therefore oxygen moves from ____ to ____
a. blood; air b. blood; interstitial fluid c. air; interstitial fluid d. interstitial fluid; blood e. interstitial fluid; air
Which of the following statements about photoreceptors is NOT true?
A. A compound eye as seen in insects has many different visual units, each containing a lens. B. Photoreceptors differ in complexity in different kinds of animals. C. Image-forming eyes are found only in vertebrates. D. The simplest photoreceptors only recognize the presence and intensity of light. E. Eyespots in planaria allow the direction of light to be determined.