Blood entering the fetal pulmonary artery bypasses the lungs through the ____
a. umbilical arteries
b. umbilical veins
c. ductus venosus
d. foramen ovale
e. ductus arteriosus
ANSWER: e
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Body functions such as heart rate, blood flow, and digestion are controlled by the:
A. autonomic nervous system. B. somatic nervous system. C. automatic nervous system. D. sympathetic nervous system.
When a population is made up of individuals who are genetically identical, each individual is said to be a ____ of the
other individuals.
a. homolog b. clone c. twin d. recombinant e. probe
What is the function of gap junctions?
a. to allow plant cells to communicate with each other b. to allow ions and small molecules to pass between cells c. to give the cell its shape d. to seal the spaces between cells
A research group claims that they have discovered microscopic fossilized embryos, including some at the blastula stage, but other researchers are skeptical. Finally, one student develops a technique for splitting the embryos in half to reveal the substructure. Cutting open the first blastocyst embryo, the student is very excited. "It is a blastula!" she shouts,"Look, you can see the ________ inside!"
A. neural tube B. granulosa cells C. hollow blastocoel D. archenteron