Trisomy 21 (Down syndrome) is the only example of an autosomal trisomy in which the fetus develops to term and is born alive
A. true
B. false
B
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Which proteins form channels in the membrane that allow selected polar molecules and ions to pass through and
across the membrane?
a. transport proteins b. recognition proteins c. receptor proteins d. cell adhesion proteins e. nuclear proteins
What is the definition of a "transgenic organism?"
A) an organism that is the first of its kind to show a particular phenotype B) an organism in which a genetic defect has been corrected using gene therapy C) an organism containing a gene from another species
If you flip the light switch in your living room and nothing happens, what might be a good hypothesis to explain the absence of light?
A) The circuit breaker for the living room might be the "off" position. B) Electricity sometimes flows backward in a wire, preventing the light from shining. C) You might have made too many telephone calls this month, thereby reducing the amount of electricity in your lines. D) The air conditioner is also running upstairs, and it might be using all of the electricity available in your house at the moment.
The role of the respiratory system is to ensure that oxygen leaves the body and carbon dioxide enters the body.
Answer the following statement true (T) or false (F)