The mammalian kidney has an outer layer called the _____ and an inner layer called the _____
A. cortex; medulla
B. pelvis; glomerulus
C. epithelium; endothelium
D. medulla; pelvis
E. glomerulus; cortex
A
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Photosynthesis is an important process that
A) is performed by heterotrophs. B) produces oxidized products. C) uses water and carbon dioxide as reactants. D) is performed by organisms living near deep-ocean thermal vents. E) only plants can perform.
During elongation, ribosomes catalyze
formation of ____ between the amino acid and the growing polypeptide.
a. a hydrogen bond b. a peptide bond c. a polar covalent bond d. a non-polar covalent bond e. a sulfur bond
Genetic recombination occurs during
a. prophase of meiosis I. b. the interphase preceding meiosis II. c. the mitotic telophase. d. fertilization. e. the formation of somatic cells.
What is the physical basis for the "mitotic clock", which controls the number of divisions one cell can undertake?
What will be an ideal response?