1) Bones tend to become brittle with age. A disease called osteoporosis causes bones to become less dense and as a result, bones break more easily. Osteoporosis is more common among older women, because they produce less of a hormone called estrogen, which aids in bone formation. Many doctors hypothesize that older women who take estrogen supplements will experience fewer broken bones. Part A: Describe how an experiment could be designed to test this hypothesis. Part B: What would be the outcome variable (dependent variable)?
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Biology, 21.06.2019 23:00
Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?
Answers: 3
Biology, 22.06.2019 15:30
Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos
Answers: 3
1) Bones tend to become brittle with age. A disease called osteoporosis causes bones to become less...
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