Inside a skeletal muscle cell, a set of small cylinders called _______ are assembled into larger cylinders called _______.
Fill in the blank(s) with the appropriate word(s).
Answer: myofilaments, myofibrils
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This graph shows both human birth weight and
newborn infant mortality. The most common birth weight is between seven and eight pounds. Human birth weight seems to be an example of a. directional selection. b. stabilizing selection. c. sexual selection. d. disruptive selection. e. artificial selection
Which of the following does not occur?
a) radially symmetrical diploblast b) diploblastic eucoelomate c) protostomic coelomate d) bilaterally symmetrical deuterostome
Increased humidity results in a decrease in transpiration.
True or False?
The reticuloendothelial system
A. is a support network of connective tissue fibers. B. originates in the cellular basal lamina. C. is heavily populated with macrophages. D. provides a passageway within and between tissues and organs. E. All of these choices are correct.