Which is an example of a benefit attributed to bacteria?
a. Bacteria can cause food spoilage.
b. Many species of bacteria cause disease in humans.
c. Bacteria in the human gut and vagina prevent the growth of pathogens.
d. Bacteria break down excess vitamin K in the human large intestine.
e. Bacteria prevent decomposition by fungi.
ANSWER: c
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Ehrlichiosis, Rocky Mountain Spotted Fever, dengue fever, and tularemia are all infectious diseases of the cardiovascular system. What feature do they have in common?
A. They are all transmitted by arthropod vectors. B. People with immune deficiencies are especially susceptible to these diseases. C. They are all endemic in the mountain states in the western U.S. D. The causative agent of each of these diseases is a bacterium.
Which of the following is not part of the process by which an endospore transforms to become a vegetative cell?
A. Germination B. Outgrowth C. Induction D. Activation
One of the reasons that most animal cells will not burst if too much water enters by osmosis is that
a. the cell wall will protect it. b. most body cells selectively move solutes out. c. carrier proteins will remove excess water. d. solute molecules will resist water molecules. e. salts will absorb the water.
Animals that feed exclusively on the tissues of other animals are called ________
Fill in the blank(s) with correct word