33. crystal thinks that plants grow better with light than in the dark. to test this hypothesis,
she performed an experiment with the following steps:
• plant five radish seeds in one cup of soil and five carrot seeds in another cup of soil.
• give both cups the same amount of water.
. place the radish seeds under a lamp, and water them every day.
• place the carrot seeds in a dark closet, and water them every day
crystal changed more than one variable in her experiment. which of these changes should
crystal make so that her data are in answering her hypothesis?
a. use only one type of seed
c. place both cups in the closet
b. place all the seeds in one cup
d. use two different types of soil
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3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.
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Pl as time goes by and water goes through the water cycle again and again, the amount of water on earth: increases decreases ostays the same goes up and down
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33. crystal thinks that plants grow better with light than in the dark. to test this hypothesis,
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