Thymosin and thymopoietin are secreted by the ________
Fill in the blank(s) with correct word
thymus
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Lignin is not found in stems of _____________
a. mosses c. monocots b. ferns d. a and b
Bacteria differ from Archaea in that
A. Archaea have peptidoglycan in their cell walls. B. Bacteria have peptidoglycan in their cell walls. C. Archaea have DNA which is in the shape of a ring. D. Bacteria have DNA which is in the shape of a ring.
Which statement regarding the nervous system is true?
A) Sensory neurons convey signals from the central nervous system (CNS) to sensory receptors. B) Motor neurons convey signals from the CNS to effector cells. C) The peripheral nervous system (PNS) is composed entirely of nerves. D) The CNS includes the brain and peripheral nerves.
A phospholipid has ______ fatty acids attached to glycerol, whereas a fat has _______.
A. 3; 4 B. 3; 2 C. 2; 3 D. 2; 4 E. 4; 2