Why do organisms need to maintain homeostasis?
What will be an ideal response?
Metabolic reactions work at optimal levels within limited ranges of temperature, pH, and other factors. When the body is outside those ranges, metabolism functions at less-than-optimal levels, which may cause illness or even death.
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Which of the following provides a powerful importance of the plant Arabidopsis?
a. its entire genome that has been sequenced b. its reproductive cycle c. its ability to be cloned d. its alternation of generations
Lampreys and hagfishes:
a. are the only extant jawless vertebrates. b. are the only extant air-breathing fish. c. are more closely related to ray-finned fish than they are to cartilaginous fish. d. have lobed fins. e. first appeared within the last 50 million years.
For individuals planning a trip to another country, such as Vietnam, which organization is the best source for information on which vaccines might be necessary?
a. Centers for Disease Control and Prevention b. National Institutes of Health c. National Safety Council d. Tourist Travel Bureau
Predict what would happen if crossing over occurred as part of mitosis
A. Daughter cells would not be genetically identical. B. Daughter cells would contain two copies of the same allele. C. There would be no effect since sister chromatids separate in anaphase. D. Answers a and b are correct.