The blood pressure in the brachial artery-the major artery in your upper arm-is at its lowest during
A. the diastolic period.
B. exercise.
C. ventricular contraction.
D. the systolic period.
E. the time the aorta is maximally stretched.
Answer: A
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What is the significance of the homeobox sequence studied in animal species?
A) Certain genetic instructions vary based on structural differences. B) Certain genetic instructions vary based on phyla. C) Certain genetic instructions for development have changed a great deal over time. D) Certain genetic instructions for development have changed very little over time.
The placement of chromosomes into one of the seven groups in a karyotype is based on the
chromosome's A. size. B. centromere position. C. banding pattern. D. size and centromere position only. E. all of these.
Why are girls less likely than boys to suffer
from Duchenne muscular dystrophy?
a. girls have less testosterone than boys b. they are protected as heterozygotes c. they do not have a Y chromosome d. girls are NOT less likely to suffer from Duchenne muscular dystrophy than boys e. a combination of more than one of the first three answers is correct
When minute samples of DNA need to be genetically analyzed for identification purposes, which test can be effectively used?
A. Weil-Felix reaction B. Widal C. PCR D. Direct fluorescence antibody E. Western Blot