How are mitosis and cytokinesis alike?
A. Both involve DNA synthesis.
B. Both involve division.
C. Both involve the nucleus.
D. Both involve mitochondria.
E. Both involve apoptosis.
Answer: B
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Which of the following statements is true regarding atmospheric CO2 levels during the last 400,000 years?
A. Atmospheric CO2 levels have remained relatively constant, and have only increased since the 1800s. B. Atmospheric CO2 levels fluctuate periodically, with the highest levels occurring during interglacial periods. C. Atmospheric CO2 levels fluctuate periodically, with the highest levels occurring during glacial periods. D. Correlation exists between low levels of atmospheric CO2 and high temperatures. E. Causation exists between low levels of atmospheric CO2 and high temperatures.
Night blindness and skin problems are due to a deficiency of ____
a. vitamin D b. vitamin E c. calcium d. vitamin A e. thiamin
Age classes grouped into pre-reproductive, reproductive, and post-reproductive categories
A) Skin cancer B) Carbon footprint C) Age structure D) Emigration E) Desertification F) Chlorofluorocarbon G) Ozone H) Carrying capacity I) Density-dependent J) Death rate
Salmon are able to live in both fresh water and salt water. Salmon are therefore:
A. conformers. B. effectors. C. regulators. D. conditioned.