Which of the following is required to detach myosin from actin?
A. Troponin
B. ADP
C. Phosphate
D. ATP
E. Calcium
Answer: D
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Which of the following statements is TRUE about chromosomes?
a. Chromosomes are always spread out as chromatin. b. Chromosomes are always condensed. c. Homologous chromosomes have the same genes on them but can have different alleles. d. Homologous chromosomes have the same genes on them and always have the same alleles of those genes. e. Chromosomes always consist of two sister chromatids.
When cooking meat, an internal temperature of ____°C must be reached to kill organisms such as Toxoplasma and Sarcocystis
a. 38 b. 48 c. 58 d. 68
What situation results from a postfertilization barrier to reproduction?
A) mutations in genes that control development B) offspring that fail to develop C) mechanical isolation of a species D) gamete incompatibility
A cross between homozygous red-eyed flies and homozygous white-eyed flies results in progeny that all have red-eyes. This result demonstrates:
a) dominance. b) the law of independent assortment. c) a blending of alleles. d) the norm of reaction. e) a dihybrid cross.