Which of the following is false?
a. All respiratory surfaces must be kept moist.
b. The amount of gas diffusing across a respiratory
membrane is dependent upon the surface area
and the partial pressure of each gas.
c. The surface area of a growing cell increases at
the same rate as its volume.
d. Ventilation maintains partial pressure gradients
between the atmosphere and the lungs.
e. Breathing and ventilation are equivalent in
respiration.
Answer: c
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Which of the following best describes the basis for separation of DNA fragments during agarose gel electrophoresis?
A. The largest fragments will migrate fastest. B. The fragments with the highest percentage of A and T will migrate fastest. C. The smallest fragments will migrate fastest. D. The fragments with the highest percentage of G and C will migrate fastest.
Photosynthesis occurs chiefly in the leaf's:
a. epidermis. b. bundle sheath extensions. c. mesophyll. d. trichomes. e. vascular bundles.
The control of breathing is centered in which of the following areas of the brain?
(A) Anterior pituitary (B) Corpus callosum (C) Cerebellum (D) Medulla Oblongata (E) Cerebrum
Which of the following best supports the idea that organisms and environments have changed over time?
A. the discovery of fossilized fern plants in Antarctica B. the production of sterile hybrid animals such as the mule C. the many different species of plants in tropical areas D. the ability of many animals to learn new behaviors