Which of the following occur during telophase I?
A) Cytokinesis produces two cells that will each go through meiosis II.
B) Cytokinesis produces four haploid gametes.
C) Sister chromatids separate and move to opposite poles.
D) Homologous chromosomes separate.
E) One cell divides two times, without interruption, into four cells.
Answer: A
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Greenhouse gases
A) such as CO2, CH4, and N2O trap infrared radiation and heat the Earth. B) such as CO2 increase plant and animal growth, resulting in more heat production on Earth. C) such as CO2 and O3 (ozone) interact with UV light and heat the Earth. D) such as CO2, CH4, and N2O destroy O3 (ozone) and allow more UV light to enter the atmosphere, thus increasing the temperature of the Earth's surface.
Gonadotropin-releasing hormone regulates
A. follicle-stimulating hormone. B. luteinizing hormone. C. steroid production by the gonads. D. both follicle-stimulating and luteinizing hormones. E. both follicle-stimulating and luteinizing hormones as well as steroid production by the gonads.
In the ________ circuit, blood leaving the ________ ultimately delivers oxygen and nutrients to all of the body's tissues and organs
A) pulmonary; lung capillaries B) systemic; vena cava C) pulmonary; myocardium D) systemic; left ventricle
What is the primary reason internal homeostasis must be maintained?
A) Most organisms have not evolved mechanisms to control positive feedback systems. B) Enzymes must retain their correct three-dimensional structure. C) Homeostasis prevents the wasting of stockpiles of coenzymes. D) Unregulated variations cause the cells' DNA to mutate. E) Wide swings in the internal environment interfere with normal metabolic reactions.