Unlike eudicot roots, the center of most monocot roots is occupied by the:a
cortex.
b. pith.
c. phloem.
d. vascular cambium.
e. xylem.
B
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Which of the following is an example of an alternative energy that uses renewable resources?
A. burning oil B. geothermal energy C. burning coal D. burning petroleum
Bones continue to lengthen throughout childhood and adolescence because
A) a growth plate is present in each epiphysis until the late teens. B) the production of cartilage for a lengthening bone occurs primarily on the inside of the growth plate. C) ossification cannot occur until after puberty. D) primary ossification occurs until death. E) the activity of osteoblasts cannot be reduced until adulthood.
Cell deteriorations due to viral infections are known as
a) transformations. b) biosynthesis. c) cytopathic effects. d) plaques.
Lymphocytes that become part of cell-mediated immunity arm of the adaptive immune response develop in the:
A) intestine. B) bone marrow. C) spleen. D) lymph nodes. E) thymus.