Down syndrome can be caused by either trisomy 21 or a Robertsonian translocation
a. True
b. False
Indicate whether the statement is true or false
True
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CDKs are important in the regulation of the cell cycle. They carry out their function by ______
A. adding phosphate groups to target proteins B. degrading cyclin proteins C. preventing the progression of a cell from one stage of the cell cycle to the next
The respiratory pacemaker is located in the
a. lungs. b. cerebral cortex. c. brain stem. d. bronchioles. e. alveoli
Two species of toads have been successfully interbred in a laboratory but do not hybridize in nature because one species mates in summer and the other mates in the fall. This is an example of ____ isolation.
a. reproductive b. ecological c. inbred d. physical e. genetic
Meristems are
a. located at the tips of stems. b. located at the tips of roots. c. regions of active growth. d. all of the above.