Tumor blood vessels are ____ with an irregular shape.
a. dilated
b. stretched
c. shaped
d. none of the above
Ans: a. dilated
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Both the nucleus in the head of the sperm and the mitochondria in the midpiece of the sperm include genetic information (DNA) about the father
The offspring, however, contains only nuclear DNA from the father but both mitochondrial and nuclear DNA from the mother. Why does the newborn lack the father's mitochondrial DNA?
According to Chargaff’s rules:a
the number of A-T base pairs is always equal to the number of G-C base pairs in all DNA molecules. b. the adenine content in any DNA molecule is always equal to the thymine content. c. the adenine content in any DNA molecule is always greater than the thymine content. d. the guanine content in any DNA molecule is always less than the cytosine content. e. there is no relationship between the ratio of purine and pyrimidine content in any DNA molecule.
In the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of _____
A) ATP, CO2, and ethanol (ethyl alcohol) B) ATP, CO2, and lactate C) ATP, NADH, and pyruvate D) ATP, pyruvate, and acetyl CoA
All of the following STDs are bacterial infections EXCEPT
A. AIDS. B. chlamydia. C. syphilis. D. gonorrhea.