What stimulates activation of B and T cells?
a. cell recognition of an antigen
b. production of complement
c. histamine production
d. lysozyme release
e. cytokine production
A
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Undifferentiated cells of plants are most likely to be present in which of the following tissues?
A. leaves B. transport systems (xylem and phloem) C. root tips D. flowers
Which of the following are strategies employed in habitat conservation?
_____ identifying representative habitats _____ identifying charismatic species _____ identifying countries rich in species _____ identifying areas rich in endemic species _____ establishing a captive breeding program
Answer the question using the accompanying graph. Which portion of the graph shows the free energy of the reaction?
a. A b. B c. C
d. W + X e. Y + Z
Describe the sequence of problems associated with tropical rainforest destruction.
What will be an ideal response?