Coniferous forests are important ecosystems, particularly in higher latitudes and altitudes. How are conifers of direct
economic importance to humans? What will be an ideal response?
Concepts to Consider: Conifers are used extensively in the lumber industry; the medicine
taxol is derived from the yew; resins and turpentine are derived from conifers; they are also
important landscape plants and are used as Christmas trees.
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To measure the population of lake trout in a 250-hectare lake, 400 individual trout were netted and marked with a fin clip, then returned to the lake
The next week, the lake was netted again, and out of the 200 lake trout that were caught, 50 had fin clips. Using the mark-recapture estimate, the lake trout population size could be closest to which of the following? A) 160 B) 200 C) 400 D) 1,600 E) 80,000
Explain the ethical concerns with germ-line gene therapy in humans
What will be an ideal response?
Which organ in the human digestive system contains an oblique layer of muscle as a part of its
muscularis?
a. esophagus b. large intestine c. liver d. small intestine e. stomach
The electrons that are passed to NADP+ during the
noncyclic pathway are obtained directly from __________ but ultimately from __________. a. chlorophyll; water b. CO2; chlorophyll c. ATP; O2 d. water; chlorophyll e. NADPH; chlorophyll