The lining of the digestive tube is formed from:a
endoderm.
b. ectoderm.
c. germ cells.
d. mesoderm.
e. pseudoderm.
A
Biology & Microbiology
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Which substance was used by ancient organisms to produce energy?
a. Hydroxide b. Methane c. Carbohydrates d. Oxygen e. Water
Biology & Microbiology
In mammals, the glomerulus is located within the
a. distal convoluted tubule. b. Bowman's capsule. c. descending segment of the loop of Henle. d. proximal convoluted tubule. e. ascending segment of the loop of Henle.
Biology & Microbiology
What cytokine is secreted by virally infected cells to induce a virus-resistant state in nearby cells?
A) interleukin-4 B) interleukin-10 C) interleukin-5 D) interferon-alpha E) interferon-beta
Biology & Microbiology
Individual water molecules are held to one another by relatively weak ________ bonds
A) covalent B) hydrogen C) ionic D) nonpolar
Biology & Microbiology