Tissue culture techniques are used to
a. produce hundreds of identical plants.
b. propagate promising mutant plants.
c. improve food crops.
d. increase production of commercially important
hybrid plants.
e. do all of these.
Answer: e
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As a population declines in size, what would you predict? Check all that apply.
_____ Loss of genetic variation. _____ More individuals with heterozygote advantage. _____ Deleterious alleles can become fixed due to chance. _____ Homozygosity within individuals in the population will decline. _____ The few remaining individuals will be tough, healthy and fertile. _____ If the environment changes, the population will adapt quickly. Additional: Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about population size and genetic diversity? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Food moves along the digestive tract as the result of contractions by _____
A) cardiac muscle B) smooth muscle C) voluntary muscle D) striated muscle E) skeletal muscle
In 2006, the greatest use of energy in the United States was _____
1.nuclear energy going to industry 2.natural gas for residential and commercial uses 3.petroleum used for transportation 4.petroleum used in industry
Which of the following lifestyle changes would have the greatest impact on reducing an individual's environmental impact?
A. Reducing the number of children in your household to reach a zero population growth rate. B. Buying a more fuel-efficient vehicle and only using it when you are taking long trips instead of traveling locally. C. Downsizing and moving into a smaller house. D. Reducing your meat consumption to once or twice a week. E. Waiting until later in life to have children and only having one per couple.