If houseplants must be left unattended for a length of time, some people recommend placing plastic bags over them. What is the reasoning behind this?
a. Water tension will decrease.
b. The plants won't freeze.
c. Photosynthesis will increase because of trapped carbon dioxide.
d. Transpiration will be slowed and more water will be retained in the soil.
e. The bag will trap oxygen.
d
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A thermoreceptor responds to:
A. wet and/or dry environmental conditions B. temperature C. physical force D. pain
Algae are to lichens as ____ are to mycorrhizae
a. club fungi b. tree roots c. water molds d. plant leaves e. mosses
The oxidative energy system fuels the body over long periods of exercise, and can use molecules other than glucose for energy. What are those other molecules?
a. ATP and GTP b. creatine phosphate and dihydrogen oxide c. dihydrogen oxide and nitric oxide d. fats and proteins e. glucose and fructose
Paired lungs are characteristic of
a. some fishes. b. all amphibians. c. all birds. d. all mammals. e. all of these