Which one of the following characteristics do
eosinophils, neutrophils, and mast cells have in
common?
a. They all lack a nucleus.
b. They are all anchored to tissue.
c. They all circulate in the bloodstream.
d. They all have granules.
e. They are all capable of targeting cancer
cells.
D
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The way in which an organism utilizes its environment may be called
A. resource partitioning. B. competitive exclusion. C. its niche. D. its habitat. E. intraspecific competition.
Which of the following represents two general factors that determine the fate of a chemical reaction in living cells?
A. its enzyme and rate B. its enzyme and direction C. its direction and rate D. its rate and product E. its enzyme and products
In order to prove that a bacterium is pathological according to Koch’s postulates, the ____
a. bacteria must be present in most cases of the disease b. bacteria must be isolated from the infected host and grown in mixed culture c. specific disease must be induced when a pure culture of the bacteria is introduced into a healthy host d. bacteria must be isolated from a transfer host e. bacterium must produce spores that can be transmitted from one individual to another
Leaves are attached randomly (regularly) to stems and play a role in photosynthesis. Indicate whether the statement is true or false