The goal of natural selection is to make extreme traits more common
Indicate whether the statement is true or false
FALSE
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Superantigens are
A. bacterial toxins that activate T cells at a 100 times greater rate than other antigens. B. cell markers found in some member of a species but not in other members. C. body tissues that the immune system mistakes as foreign. D. antigens that evoke allergic reactions.
If a DNA sequence on one strand is ATCGATG, what is the corresponding sequence on the other strand?
a. TAGCTAC b. UAGCUAC c. TUGCUTC d. ATCGATG e. TTACGTC
Los Angeles, California, has an average daily temperature between 70°F and 80°F for most of the year. There's very little rainfall except during a rainy season beginning in the fall. What does this describe about the city's conditions?
A) climate B) weather C) biome D) ecosystem
A certain wastewater treatment plant uses aerobic bacteria, anaerobic bacteria, and archaebacteria during secondary treatment of sewage. Unfortunately, during a bad blizzard the aerated tanks froze, killing the microbes inside. What is likely to result?
A. Solid material will not be effectively filtered out. B. Floc will not be effectively filtered out. C. Methane production will go down. D. Floc levels will diminish.