Contains osteocytes surrounded by hard matrix.
What will be an ideal response?
Bone
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Inbred lines of animals, such as laboratory mice, are useful for studying complex traits because:
A. individuals are genetically identical, so differences in traits must be due to environmental differences. B. although individuals differ both genetically and environmentally, the genetic differences are known, so differences in traits can be understood. C. animals are kept in identical environments, so any differences in traits are due to differences in their genes. D. both genetic and environmental differences between individuals are known, making differences in their traits easy to understand. E. None of these choices is correct.
You look outside and realize that your grass needs to be mowed. You pick up the container of gasoline and see that you have approximately a third of a gallon left. You hypothesize that this amount will be enough to mow your entire lawn. Unfortunately, half way through mowing your lawn you run out of gasoline. You grumble and think to yourself that the next time you mow the lawn, you hypothesize that you will need to have at least two-thirds of a gallon of gasoline available. How did the results of your lawn-mowing experience influence the validity of your new hypothesis for future gasoline needs?
A. Your prediction proved that your hypothesis is correct. B. Your hypothesis was supported by trial and error. One more trial added to your data set. C. The hypothesis was invalidated by your experimental evidence. D. Your prediction of future gas needs is based on experimental data and therefore increases the validity of your hypothesis.
Which of the following is a true statement about cycads?
a. Cycads can be pollinated by beetles. b. Cycads are the most common gymnosperm. c. Cycad leaves are a source of ephedrine. d. Cycads have only one surviving species.
SIV causes symptomless infections in monkeys and apes, yet causes AIDS-like disease in chimpanzees. HIV is closely related to SIV and causes AIDS in humans. Which of the following is the best explanation for these observations?
a. Monkeys, apes, and chimpanzees are all genetically very similar b. The effects of viruses on different species is random c. Chimpanzees and humans have a more recent common ancestor d. SIV is most likely lytic in apes and monkeys e. SIV is most likely latent in chimpanzees