?-galactosidase is used in bacterial screening assays for visualization of colonies that contain recombinant DNA. What
is its substrate?
a. lactose
b. X-gal
c. sucrose
d. lacZ
e. agarose
ANSWER: b
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Which are endocrine organs? (Check all that apply.)
_____ adenohypophysis _____ adrenal gland _____ cochlea _____ hypothalamus _____ ileum _____ lymph node _____ neurohypophysis _____ ovary _____ pancreas _____ pineal gland _____ salivary gland _____ sebaceous gland _____ spleen _____ testis _____ thyroid gland
How many pairs of ribs do male and female
humans have?
a. 12 in males and 13 in females b. 12 in males and 11 in females c. 12 in males and 12 in females d. 14 in males and 12 in females e. 14 in males and 14 in females
Methanogens may contribute to the greenhouse effect and global warming due to methane production.
Answer the following statement true (T) or false (F)
The inheritance of sex-influenced traits can be dominant in one sex but recessive in the other
a. True b. False