Design a complete ecosystem that would sustain a number of living organisms for several years in a sealed container
The only thing that can be added is sunlight. Explain why you have selected each organism. What will be an ideal response?
Concepts to Consider: Include producers (plant), consumers (animal), and decomposers (heterotrophic bacteria and fungi); plants convert sunlight to organic energy, animals
consume the plants, and decomposers recycle nutrients within the dead plants and animals;
animal and bacterial wastes are taken up by plants.
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How many molecules of O2 can a single hemoglobin molecule carry when fully saturated?
A. 4 B. 8 C. 1 D. 2 E. 16
Animals are distinguished from other groups of eukaryotic organisms in that they (select all that apply):
A. are multicellular heterotrophs lacking cell walls. B. have embryos that include a gastrula stage. C. produce collagen. D. are multicellular heterotrophs lacking cell walls and have embryos that include a gastrula stage. E. move.
Most brown algae start life attached to rocks; a notable exception is:
a. giant kelp. b. North Atlantic Sargassum. c. feather boa kelp. d. Laminaria. e. Fucus.
The incidence of deaths from communicable disease is ________ in the United States compared to the entire world.
A. about the same B. less C. greater