Biology, 20.07.2019 21:30 morrisjillian23
Ascientist conducts a test and finds out that the ld50 of a certain chemical is 20 mg per kilogram. explain what this means.
Answers: 1
Biology, 21.06.2019 20:00
After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.
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Biology, 21.06.2019 21:00
Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley
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Biology, 22.06.2019 11:30
Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?
Answers: 1
Ascientist conducts a test and finds out that the ld50 of a certain chemical is 20 mg per kilogram....
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