hemlocks are a common type of tree in the northern forests of the united states. in studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. she wondered why there were so few young hemlocks. by reading the records that other foresters in that area had kept, she learned that the population of deer living in the forest had doubled in the last five years. by reading studies on forests that other scientists had performed, she also learned that deer in similar forests like to eat young hemlocks and the young trees of other species.
in the scenario, the forester wonders why one forest had many mature hemlocks but very few young hemlocks.
which part of a scientific method does this best illustrate?
Answers: 3
Biology, 21.06.2019 20:00
Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data
Answers: 1
Biology, 22.06.2019 09:30
Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?
Answers: 2
Biology, 22.06.2019 19:30
When sodium chloride dissolves in water the sodium cholride dissociates into?
Answers: 1
hemlocks are a common type of tree in the northern forests of the united states. in studying one for...
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