The immune system consists of ____
a. physical barriers only
b. innate immunity only
c. adaptive immunity only
d. innate and adaptive immunity only
e. physical barriers, innate immunity, and adaptive immunity
ANSWER: d
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Which of the following characterizes parthenogenesis?
A) An individual may change its sex during its lifetime B) Specialized groups of cells grow into new individuals C) An organism is first a male and then a female D) An egg develops without being fertilized E) Both mates have male and female reproductive organs
Which of the following transcription factors is present at the highest concentration in the eve stripe 2 region of the fruit fly?
A. bicoid B. Hunchback C. Krüppel D. Giant
As much as 95% of BOD can be removed during secondary treatment
Indicate whether this statement is TRUE or FALSE.
The water-soluble portion of a phospholipid is the polar head, which generally consists of a glycerol molecule linked to a phosphate group.
a. true b. false