Which action best illustrates in situ conservation?
a. breeding captive species in zoos
b. collecting eggs from nature
c. participating in artificial insemination
d. breeding captive species and collecting eggs from nature
e. designating a large area as a national reserve
e
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Some species of cyanobacteria can fix atmospheric nitrogen.
Answer the following statement true (T) or false (F)
The Calvin Cycle can only produce sugar if ______can enter through the pores of the leaves.
A. O2 B. CO2 C. water D. potassium E. N2
Conjugation is a process in which:
a. a virus, containing pieces of bacterial DNA that it inadvertently picked up from its previous host, infects a bacterial cell. b. a bacterial cell bursts open, releasing short lengths of DNA, which are taken up by another bacterial cell and inserted into its own genome. c. exact copies of a bacterial cell's DNA are transferred into daughter cells. d. a bacterium transfers a copy of some or all of its DNA to another bacterium.
The non-leukocyte tissue cells known as ________ activate enzymes which produce leukotrienes and prostaglandins in response to allergen binding.
A. neutrophils B. basophils C. monocytes D. lymphocytes E. mast cells