The main role of the large intestine is to ________
A) absorb nutrients
B) absorb water
C) produce bile, which helps the process of digestion
D) break large food into smaller food bits
B
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After looking at the experiment in the figure above, what can be said about productivity in marine ecosystems?
A) Nothing can be said based on this information. B) Marine organisms break down iron for energy and thus for productivity. C) Iron can be a limiting nutrient in productivity. D) Productivity increases when chlorophyll a is added.
When a cell reproduces by mitosis and cytoplasmic division, does its life end?
What will be an ideal response?
All of the following problems are direct results of human impact on the nitrogen cycle except:a
photochemical smog. b. global warming. c. acid rain. d. El Niño-Southern Oscillation events. e. depletion of the ozone layer.
Ferns possess all of the following EXCEPT:
a. cuticles. b. embryos. c. seeds. d. roots. e. leaves.