_______ is a type of symbiosis in which one species benefits but the relationship has no effect (good or bad) on the other species.
a) predation
b) parasitism
c) mutualism
d) commensalism
Ans: d) commensalism
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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.
Fungi feed through extracellular digestion and then absorption. How would the rates of decomposition of detritus be altered if fungicide (something that kills fungi) were sprayed on the forest floor?
A. Decomposition rates would be lowered because fungi would be destroyed. B. Decomposition rates would be higher because bacteria would take over the role of decomposition, and they reproduce at faster rates than fungi. C. Decomposition rates would be the same because fungi don't have hyphae above ground, so they would not be destroyed. D. Decomposition rates would be lowered because fungi would choose to grow in an area without fungicide.
Antiseptics are generally regulated by the ________.
A. Environmental Protection Agency B. The National Institutes of Health C. Centers for Disease Control and Prevention D. Food and Drug Administration
Cells found in plants and animals have similarities but can differ in function. Consider the following two organisms: a corn plant cell (Zea mays) and a camel cell (Bactrianus ferus). What is the best explanation for the difference in the cellular vacuole size between these two biotic organisms?
A. The corn cells' have a small vacuole size because it does not need long term water and electrolyte storage. B. The camel cells' have a small vacuole size because it does not need long term water and electrolyte storage. C. The camel cells' have a small vacuole size because it is not in contact with toxins that need to be removed from the cell. D. The corn cells' have a large vacuole size because it is in contact with many toxins in the soil which need to be removed from the cell.