Spindles disappear during
A. prophase I.
B. telophase II.
C. anaphase II.
D. metaphase I.
B. telophase II.
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The amino acids of the protein keratin are arranged predominantly in an ?-helix. This secondary structure is stabilized by _____
A) covalent bonds B) peptide bonds C) ionic bonds D) polar bonds E) hydrogen bonds
Excessive amounts of blood lipids increases the risk of ____
a. arteriosclerosis b. atherosclerosis c. hypertension d. a heart attack e. angioplasty
When the Darwin/Wallace theory of natural selection is summarized, four central postulates emerge. Which of the following is NOT one of these four natural selection postulates?
A) Variations exist in any given generation of a species. B) Variations in traits are produced by mutations. C) Variations are, at least in part, heritable. D) Those individuals whose variations confer an advantage are more likely to survive and reproduce.
Errors or changes in the DNA of an organism are called ________
Fill in the blank(s) with correct word