How do plants benefit from a mycorrhizal partnership with a soil fungus?
a. the fungus provides sugars
b. the fungus participates in photosynthesis
c. they provide digestive enzymes
d. they increase the absorptive surface area of the plant and provide water and nutrients
e. the protect the plant from pathogens
d
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Which of the following defines ecological resistance?
a. the ability of an ecosystem to remain at equilibrium despite disturbances b. the ability of a species or group of species to synthesize food molecules c. the speed at which an ecosystem recovers equilibrium after being disturbed d. the actions required for the species in a system to remain the same
Which type of RNA is translated within a cell?
A) tRNA B) mRNA C) rRNA D) siRNA E) all of the above
The system that helps all others maintain homeostasis by transporting oxygen, nutrients, carbon dioxide, and wastes is the.
a) circulatory system b) respiratory system c) excretory system d) digestive system
Due to a mutation in a smooth muscle gene, the blood vessels in the skin of a certain strain of mouse become dilated when temperature falls below a certain point. Based on the likely outcome of this mutation, what precautions should the researchers take to maintain the health of their mice?
A. The mice will be susceptible to high blood pressure, and should not be provided with exercise wheels. B. The mice will have weak muscles, and should be provided with exercise wheels. C. The mouse room should be consistently maintained at a warm temperature. D. The mouse room should be maintained at a cooler than normal temperature.