The uptake of water and mineral ions from the soil occurs primarily at the
a. endodermis.
b. root cap.
c. quiescent center.
d. pericycle.
e. root hairs.
E
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Which of the following indicates when the tree was likely suffering drought stress?
1.The close location of two cycles of early wood shown in A.
2.The lack of xylem vessels in C.
3.The large vessels in the xylem shown in B.
4.The two series of xylem vessels close together shown in D.
Antigens found in food, dust mites, pollen, fur, and some oils in plants that elicit an immune attack are called
A. pathogens. B. antibodies. C. histamines. D. allergens. E. cytokines.
Which skeletal feature did NOT enhance hominin bipedal locomotion?
a. broader pelvis
b. alignment of the toes c. complex curvature of the spine d. foreman magnum at the center base of skull e. foreman magnum at the center rear of skull
The most common method of bacterial reproduction is
A) prokaryotic fission. B) meiosis. C) mutation. D) budding.