Organisms come into sexual maturity at different times of the year. This is an example of:
A) temporal isolation. B) hybrid infertility. C) hybrid inviability. D) hybrid vigor.
Answer: A
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According to the fluid mosaic model of cell membranes, the fluid part of the model refers to ____
a. the constant movement of the hydrophilic tails in the interior of the membrane b. a thin layer of water found sandwiched between the two layers of phospholipids c. the phospholipid molecules which vibrate, spin, and exchange places within the same layer of the bilayer d. the free movement of cholesterol molecules within the membrane e. the frequent flip-flop of phospholipids from one side of the membrane to the other
An avid gardener composts her wastes near the back of her property, away from her house. She moved the compost heap out there because it sometimes heats up enough to smoke. When asked why it heats up so much, she answers, simply, “Because the second law of thermodynamics says so!” How does the second law of thermodynamics explain her compost smoking?
a. Gardeners will often set their compost heaps on fire first to accelerate the rate of decomposition. According to second law of thermodynamics, ash and carbon form and smoke is given off. b. The second law of thermodynamics says that energy in a system is always increasing. This increase in energy includes the energy in compost heaps. As the energy increases, heat is produced. c. The breakdown of compost involves a transformation of energy from chemical bonds in the decomposing organic matter. The second law of thermodynamics says that there is no 100% energy transfer, so some of the energy is lost to the surroundings as heat. d. The gardener is incorrect and her garden compost heap has nothing to do with the second law of thermodynamics.
Ribosomes are directly associated with which process?
A) Transcription B) Translocation C) Translation D) Replication
Illuminated chloroplasts deprived of carbon dioxide
A. will not make ATP, NADH, or glucose. B. will not make ATP, but will make NADH and glucose. C. will make glucose, but will not produce ATP or NADH. D. will accumulate ATP, NADPH, and not produce glucose.