The H5N1 influenza killed more than 50% of those infected
a. True
b. False
True
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Insulin is a product of
A. pancreatic ?-cells. B. pancreatic ?-cells. C. pancreatic exocrine cells. D. the kidney. E. the liver.
Herbivory has a ______ effect on one species, and ______ effect on the other.
A. positive, a positive B. negative, a negative C. positive, a negative D. positive, no E. negative, no
Beginning with the germination of a moss spore, what is the sequence of structures that develop after germination?
1. embryo 2. gametes 3. sporophyte 4. protonema 5. gametophore A) 4 ?1 ? 3 ? 5 ? 2 B) 4 ? 3 ? 5 ? 2 ? 1 C) 4 ? 5 ? 2 ? 1 ? 3 D) 3 ? 4 ? 5 ? 2 ? 1 E) 3 ? 1 ? 4 ? 5 ? 2
One of the proposed solutions to global warming is to grow a large number of trees. This could be effective because:
A) plants are the base of all ecological food chains. B) trees would move carbon from CO2 in the atmosphere to organic molecules. C) plant carbon is different from atmospheric carbon. D) the gross primary production of trees moves CO2 into soil. E) when decomposed, plant carbon is impossible to convert back to CO2.