A baseball player leaping for a baseball and a cricket jumping away from a frog are both using ________. I) sensory receptors II) the central nervous system III) a muscle system
A) I only
B) II only
C) III only
D) I, II, and III
D
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Two genes on each of four homologous chromosomes (HC) are described here, but only one of each
pair of sister chromatids is listed (HC1 and HC2). Capital and lower case indicate different alleles of the same gene. What four gametes will result from a single chiasma if the chromosomes have the following genes: HC1: ab; HC2: AB?
a. Ab, AB, ab, aB b. Ab, Ab, aB, aB c. Aa, Bb, ab, Ab. d. Ab, Ab, AB, AB e. AB, AB, ab, ab
Germline engineering would
a. alter a cloned embryo's genetic makeup. b. replace defective genes. c. insert missing genes. d. modify damaged genes. e. all of these.
Activated B cells divide to form plasma cells and memory B cells, both of which are short-lived and secrete copious
amounts of antibody molecules into the bloodstream. a. True b. False
A ________ is the sexually immature feeding stage of an animal that undergoes indirect development
Fill in the blank(s) with correct word