In hydrogen bonding, hydrogen nearly always pairs with:
A) another hydrogen. B) sodium or chlorine.
C) carbon. D) oxygen or nitrogen.
Answer: D
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Which process is used to release insulin from pancreatic cells into he bloodstream?
A.) exocytosis B.) endocytosis C.) active transport D.) passive transport
The single-factor crosses performed by Mendel support the observation that
A. the two alleles for a given gene are found within the same gamete. B. if the dominant alleles for two different genes are on different chromosomes, they will never be found within the same gamete. C. if the recessive alleles for two different genes are on the same chromosome, they will never be found within the same gamete. D. only the dominant alleles for a given trait are found in an organism's gametes. E. the two alleles for a given gene are distributed randomly among an individual's gametes.
Blood agar is an example of a(n) ________ medium
A) selective B) general-purpose C) enrichment D) differential
In a Pacific kelp forest, which is a keystone species?
a. Giant kelp b. Sea otters c. Humans d. Sea urchins