You find a protist that has a single flagellum surrounded by a collar of microvilli. You correctly conclude that this
organism is a(n):
a. plasmodial slime mold.
b. cellular slime mold.
c. choanoflagellate.
d. foraminiferan.
e. alveolate.
b
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Answer the following statements true (T) or false (F)
1. Gangrene is always caused by a bacterium. 2. Trachoma, Rocky Mountain spotted fever, and ehrlichiosis are all caused by obligate intracellular pathogens. 3. a-Hemolytic streptococci of oral origin and Staphylococcus epidermidis are common causes of subacute bacterial endocarditis (SBE). 4. Haemophilus influenzae is the most common cause of influenza. 5. Meningitis can be caused by a virus, a bacterium, a fungus, or a protozoan.
Which of the following is most directly associated
with a stimulus? a. integrators b. receptors c. effectors d. central nervous system e. all of these
As the population of a predator increases, the
A) population of the prey species decreases. B) birthrate of the prey species increases. C) mortality rate of the prey species decreases. D) proportion of the prey population that is captured and consumed decreases.
Fruit flies all look more or less alike. If you have a male and female fruit fly, how could you test the hypothesis that they're the same species?
A) Determine the sequence of several of their genes. B) Examine them closely under a microscope, and compare what you see to a published description of fruit flies. C) See if they'll mate when they're put together. D) See if they mate and if their offspring can also mate.