Biology, 23.07.2019 18:30 shaydog7107
Johannes wants to know whether soil, water, or both are needed for plant growth. he chooses to conduct experiments on a willow tree for five years to answer his question. how can his experimental methods be changed to improve his experiment? a. he needs to ask scientists what they think. b. he needs to conduct the experiment for a longer period. c. he needs to use a larger sample size. d. he needs to test more factors in the environment.
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Biology, 22.06.2019 09:30
What is the difference between a scientific hypotheses and a scientific theory?
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Biology, 22.06.2019 12:50
Aresearcher created three groups based on participants bmi: normal weight, overweight and obese. the hypothesis being tested is that the three groups differ in the mean number of artificially sweetened drinks consumed weekly. which statistical test might the researcher use, assuming a reasonably normal distribution of values.
Answers: 1
Biology, 22.06.2019 13:20
There are only about 250,000 known fossil species. true or false
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Biology, 22.06.2019 13:50
The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?
Answers: 2
Johannes wants to know whether soil, water, or both are needed for plant growth. he chooses to condu...
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