Carbon dioxide is transported in the blood in all of the following ways EXCEPT
a. disolved in plasma
b. combined with hemoglobin
c. as bicarbonate ions
d. by white blood cells
Ans: d. by white blood cells
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Treehoppers (a type of insect) produce honeydew, which ants use for food. Treehoppers have a major predator, the jumping spider
Researchers hypothesized that the ants would protect the treehoppers from the spiders. In an experiment, researchers followed study plots with ants removed from the system and compared them to a control plot. In the figure above, what can you conclude? A) Ants do somehow protect the treehoppers from spiders. B) Ants eat the honeydew produced by treehoppers C) Ants reduce the numbers of treehoppers. D) No specific conclusions can be drawn from this figure. E) Treehoppers do not produce honeydew in July and are not protected by the ants.
Which groups of microorganisms are most likely to be found on the skin?
a. Bacteria, yeast and protozoa b. Protozoa, bacteria and fungi c. Yeast, fungi and plant spores d. Fungi, bacteria, and yeast e. Protozoa, yeast and fungi
Malthus' idea that was incorporated into the natural selection summary by Darwin suggested that limited resources
A. preserve harmful variations and eliminate favorable variations in a population. B. eliminate both favorable and harmful variations in a population. C. preserve favorable variations and eliminate harmful variations in a population. D. preserve favorable and harmful variations in a population. E. neither preserve nor eliminate harmful variations in a population.
What pattern of inheritance applies to a woman with type A blood who has the alleles IA and i?
A) polygenic inheritance B) simple dominance C) codominance D) sex-linked recessive inheritance