Osteoporosis is a condition in which the density of bones is decreased so much that the individual is at a higher risk of fractures. The more calcium in the bones, the better the bone density. Which of the following would produce the greatest increase in bone calcium levels?

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#Question id: 12467

#Unit 10. Ecological Principles

Review the formula for effective population size. Imagine a population of 1,000 small rodents. Of these, 300 are breeding females, 300 are breeding males, and 400 are nonbreeding  juveniles.  What is the effective  population size?

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#Question id: 12693

#Unit 8. Inheritance Biology

A panel of cell lines was created by human-mouse cell line hybridization. Each line was examined for the presence of  human chromosome and for the gene production. The following result were obtained;

On the basis of these results, which chromosome has the gene  that encodes the enzyme ?

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#Question id: 23890

#Unit 13. Methods in Biology

Which of the following is an essential element of plasmids used as cloning vectors?

a. a centromere

b. a telomere

c. an origin of replication

d. a drug resistance gene

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#Question id: 28198

#Unit 5. Developmental Biology

Cells of the responding tissue must have both a receptor protein for the inducing factor and the ability to respond to the signal, the ability to respond to a specific inductive signal is called as____

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#Question id: 14952

#Unit 6. System Physiology – Plant

Some are thin areas where the primary wall is not covered by a secondary wall and are populated with plasmodesmata known as