Degenerative joint disease (DJD) commonly affects the knee joints because ___________
Fill in the blank(s) with the appropriate word(s).
Ans: They are major weight-bearing joint
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How many fossil species have been collected?
a. 500,000 b. 125,000 c. 250,000 d. 100,000 e. 1.2 million
One of the key factors in vertebrate colonization of many diverse environments is
A. the flexibility provided by selective reabsorption of different solutes. B. not requiring a lot of water due to their closed systems. C. the ability to eat foods with lots of water. D. the ability to control water loss by controlling perspiration. E. the ability to decrease metabolic needs.
Many people hope that they will one day be able to travel into space for extended periods of time. What are the health risks to the bones and muscles of those people interested in such "space vacations"?
What will be an ideal response?
In the ABC model of flower development in Arabidopsis thaliana, sepals form when which gene(s) is/are switched on?
A. A only B. A and B C. B and C D. C only E. A and B and C