The cytoskeleton has several primary functions. The first and most obvious is that it acts as an interior skeleton that supports the rest of the cell. What is another function of the cytoskeleton?
A. It connects one cell to another.
B. It creates a durable outer covering to increase the strength and rigidity of the cell.
C. It provides a communication network whereby chemo-electrical signals can be sent from one area of the cell to another.
D. It provides a series of tracks along which vesicles can move throughout the cell.
Answer: D
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Each chromosome has one or more ________ site(s) where replication begins.
A. bifurcate B. origin C. promoter D. replicon
External signals, such as hormones and growth factors, can stimulate a cell to go through the cell cycle.
Answer the following statement true (T) or false (F)
Which gland is associated with biological clocks or biorhythms?
a. pineal b. parathyroid c. hypothalamus d. pituitary e. thymus
Large ears is a rare trait in a mainland population of mice. A female mouse homozygous for very large ears sneaks onto a boat and arrives at an island that already contains mice. This mixing will lead to a population with a higher incidence of big ears than the mainland population because ofÂ
A. genetic drift. B. gene flow. C. natural selection. D. increased mutation. E. a bottleneck effect.