Which of the following is a tenet of the Cell Theory?
1) All organisms are composed of one or more cells.
2) The cell is the structural unit of life.
3) Cells can arise only by division from a preexisting cell.
4) Cells divide only by fission.
A) 1
B) 2
C) 3
D) 4
E) 1, 2 and 3
Answer: E) 1, 2 and 3
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You have been using massive amounts of weed killer and insecticide to kill weeds in your yard, as well as the grubs and aphids that are munching on your roses and your grass. What effect might this have from a microbiological standpoint?
A. Loss of microbial diversity in the soil B. Damage to the mycorrhizae C. Reduction in microbial numbers in the soil D. Damage to the nitrogen fixing bacteria E. All of the above may be effects of this practice.
Which factor is least likely to cause a plant to enter abscission?
a. Infection b. Injury to the leaves c. Moderate temperatures d. Decrease of water e. Nutrient deficiency
Describe at least 3 adaptations of modern whales adapted for a completely aquatic existence
What will be an ideal response?
Radiation treatments to decrease bone pain are.
A) palliative. B) prophylactic. C) curative. D) proliferative.