An immunization against cow pox should protect an individual:a
by increasing the production of lymphocytes by the bone marrow.
b. through the production of diverse antibodies.
c. by initiating a secondary immune response.
d. against other antigens with the same antigenic determinants.
e. against other bacterial infections.
D
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Xylem sap and soil water differ in _________ because of ___________
A. solute composition; selective uptake by the endodermis B. solute composition; selective uptake by mycorrhizae C. solute composition; selective uptake by the epidermis D. pH; H+ exclusion by the endodermis
Which type of reproductive isolation
mechanism is most closely related to allopatric speciation?
a. temporal b. mechanical c. behavioral d. ecological e. genetic
What is a simple hormone pathway?
What will be an ideal response?
Which mechanism of nutrient acquisition is not seen in bacteria?
A. Group translocation B. Active transport C. Endocytosis D. Simple diffusion E. Facilitated diffusion