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

Biology & Microbiology

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The respiratory pacemaker is located in the

a. lungs. b. cerebral cortex. c. brain stem. d. bronchioles. e. alveoli

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology