In the diagram of a root tip shown above, the item labeled "1" is the
a. quiescent center.
b. zone of cell division.
c. zone of elongation.
d. root cap.
e. zone of maturation.
E
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Which major class of nutrients is primarily responsible for providing that full feeling after a meal?
A. carbohydrates B. nucleic acids C. fats D. water
Graft-versus-host disease results under which conditions?
A) when immunocompetent cells are placed in an immunocompromised host B) when immunodeficient cells are placed in an immunocompetent host C) any time tissue is not exactly matched in a transplant D) only when adult cells are transplanted into a baby
When an enzyme catalyzes a reaction
A) it lowers the activation energy of the reaction. B) it raises the activation energy of the reaction. C) it acts as a reactant. D) it is used once and discarded.
The hypophyseal fossa of the sella turcica, surrounds the pituitary gland, and is a part of the ________ bone.
Fill in the blank(s) with the appropriate word(s).