1)How does a hypothesis affect a scientific investigation?
You hypothesis is your prediction for what you're testing for, so it affects what experiment(s) you're going to do.
2) Detail the steps involved in designing an experiment.
Use the scientific method: Make a testable hypothesis. Design a study and collect data. Analyze results and reach conclusions. Communicate the results. Replicate the results.
3) what is the difference between an observation and a conclusion?
Observations are small details that you see during your experiment. Conclusion is the big idea that you get from your experiment.
Desertification extends beyond the expansion of existing deserts to include land degradation due to human activity in drylands. Land degradation destroys or reduces the productivity of the soil, and is caused by excessive and unsustainable activities such as deforestation, overgrazing, poor land management, soil salinization, and soil erosion.
Sure hope this helps you :D
The answer is D
hope this helps
I am mostly sure the answer is B. Good luck, and sorry if it's wrong! :(
Answer :Erwin Chargaff a Biochemist
Explanation:
He formulated the base paring of double helix of DNA. He reasoned that since the percentage of four DNA bases are of this proportions in human;
Adenine=30.9% and Thymine =29.4%;
Guanine=19.9% and Cytosine =19.8%
Then, the amount of adenine will always be equal to thymine,
And the amount of Guanine equals to cytosine based on this percentages of distribution.
(Adenine and Guanine are large, molecule of Purines, while thymine and Cytosine are Pyrimidine)
He concluded (although scientist believed, he did not explicitly stated this) that this should be the base paring patterns in DNA molecule. This is the first Chargaff Rule.
His second rule is that the DNA composition, in the relative amount of the four bases Adenine, Thymine, Cytosine and Guanine varies in proportion from one organisms to another. And this is the basis of molecular diversity.
