A ____ gene determines the structure of body parts during embryonic development
a. homoplasy
b. homeostatic
c. homologous
d. homeobox
e. homogenous
ANSWER: d
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An attenuated strain of a pathogen
A) has lost its virulence, but may be used to create a vaccine. B) has changed its antigens to avoid an adaptive immune response. C) is more virulent than the regular strains and may cause septic shock. D) is an extracellular pathogen that will be cleared by innate immunity.
Which of the following are muscle cells that are active in vasoconstriction and vasodilation of blood vessels?
A. Skeletal muscle cells B. Cardiac muscle cells C. Endocardium D. Smooth muscle
Answer the following statements true (T) or false (F)
1. A stigma is an organelle that pumps water out of the cell. 2. Sexual spores are also known as conidia. 3. Classification of fungi is based on the type of conidia that they produce. 4. Protozoa that move by means of pseudopodia are in a category known as Sarcodina. 5. Fungi can cause both infectious diseases and microbial intoxications.
Which of the following can be considered a habitat corridor?
A) a large lake in a city park B) an abandoned agricultural field in an urban area C) a strip of forest along the banks of a river flowing from a forested mountain through a city D) a patch of forest within a city park