Which of the following is an exocrine gland?

A. salivary glands
B. parathyroid
C. adrenal gland
D. thymus
E. testes


Answer: A

Biology & Microbiology

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There are sixty-one codons that each specify the addition of a specific amino acid, and three stop codons for which there is no corresponding amino acid. However, there are only about forty tRNA molecules, representing forty anticodons

How is that possible? A) Only about forty of the recognized sixty-one codons are present in mRNA. B) An anticodon forms hydrogen bonds with the codon; it must match the first two bases of the codon, but is less specific with respect to the third base. C) There are tRNAs that can bind one of two related amino acids. D) Only twenty of the codons are activeâ€"one for each amino acid.

Biology & Microbiology

How can seagrasses contribute to the building of the environment in which they live?

What will be an ideal response?

Biology & Microbiology

Choanocytes are found in ____ and participate in intracellular digestion

a. birds b. earthworms c. grasshoppers d. humans e. sponges

Biology & Microbiology

Height (tallness) in humans is a polygenic trait. Assume the following: There are four genes that determine height (Aa, Bb, Cc, Dd).  Each dominant allele adds 2 inches of height to an individual.  The height of the recessive individual (aabbccdd) is 5 feet.  What is the height of a person with the genotype AABbccDD?

A. 5 feet; 6 inches B. 6 feet; 6 inches C. 5 feet; 8 inches D. 5 feet; 10 inches E. 5 feet; 4 inches

Biology & Microbiology