A type of symbiosis in which one species benefits from the relationship while the other neither benefits nor is harmed is called
A. commensalism.
B. benefitism.
C. parasitism.
D. mutualism.
Answer: A
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Which of the following has increased as a direct result of stratospheric ozone depletion?
a. CO2 b. UVB c. CFCs d. nitrous oxides e. sulfur oxides
In many parts of the Everglades in Florida, excessive irrigation is lowering water levels and allowing salt water to enter the normally freshwater swamps. Why is this a problem for plants that have adapted to life in these swamps?
A. The salt competes with minerals for uptake by the plants, limiting their growth. B. Salts bind to nitrogen, preventing it from being taken up. C. The plants cannot move sugars down the xylem if there is salt outside of the roots pulling water out. D. Photosynthesis is inhibited by salt. E. The plant roots cannot take up water if the soil salt concentration is high.
The ________ reflex can be considered the body's first line of defense against hemorrhage-induced low blood pressure.
What will be an ideal response?
In seed plants, __________ allow reproduction without standing water.
Fill in the blank(s) with the appropriate word(s).