The respiratory pacemaker center is located in the ____
a. spinal cord
b. lungs
c. frontal lobe
d. brain stem
e. diaphragm
ANSWER: d
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Because genetic information is stored as a linear sequence of bases in DNA, any change in the order or number of bases in a gene can result in a(n) ____________________ that produces an altered ____________________
Fill in the blank(s) with correct word
In peas, the round allele is dominant over the wrinkled allele. A plant with round peas was crossed to a plant with wrinkled peas and all of the resulting plants had round peas. What is the genotype of the parents in this cross?
A) RR × rr B) RR × Rr C) Rr × rr D) Rr × Rr E) rr × rr
The ability of retroviruses to induce tumors is related to which enzyme?
a) Reverse transcriptase b) RNA polymerase c) DNA polymerase d) Protease
A community and its physical environment are often referred to as a(n) ________
Fill in the blank(s) with correct word