Antigens are substances that the immune system does not recognize as self. Which of the following are antigens?
A) strep throat bacteria
B) cancer cells in the lung
C) HIV
D) All of these can act as antigens.
D
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Choose the true statement about genome size and gene number in animals.
A. There is a strong correlation between the number of genes and genome size. B. Much of the extra DNA in humans is in the form of exons. C. The pufferfish has a larger genome than humans and more genes. D. Genome size differences depend to a large extent on the amount of retrotransposon DNA present.
In slash-and-burn agriculture, the yield from the first crop is usually quite high
___________________ Indicate whether the statement is true or false.
The outermost layer of cells of the skin is the
A. stratum spinosum. B. stratum corneum. C. stratum basale (basal layer). D. stratum granulosum.
Neonatal jaundice results when a newborn baby's liver is not working fully to remove a particular waste product. Treatment involves placing the infant under a blue light, which reacts with the waste product and converts it to a form that the kidney can
excrete. What is this waste product called? A) erythropoietin B) hemoglobin C) oxyhemoglobin D) bilirubin