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Kazeer [188]
4 years ago
9

Darwin noticed differences in the beak shapes of finches on the various islands of the Galapagos and surmised that they all migh

t have evolved from a common ancestor on the mainland. If Darwin had known about molecular biology, a field of study that did not exist at the time he lived, how might he have used it to test his hypothesis?
Biology
2 answers:
Amanda [17]4 years ago
4 0
He could perform some DNA tests that could show how those species were related. For example, genome sequencing could show all the differences in DNA nucleotides. The number of changes could then be multiplied by the rate of mutations and the result would show how species were related.
diamong [38]4 years ago
4 0

The answer is:   He could have done DNA tests on the birds to see how closely they were related.

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The label on a container of cottage cheese describes it as "fat free." what is the fda-approved requirement for this to be true?
yulyashka [42]

The correct answer is less than 0.5 gram of fat per serving.  

According to the Food and Drug Administration, the % of fat-free must comprise 3 grams or less than of the overall fat for a given reference amount. A 100 percent fat-free claim may be made only on foods, which meet the criteria for fat-free and also comprise less than 0.5 grams of fat per 100 grams and comprise no supplementary fat.  


6 0
4 years ago
You are a scientist researching West Nile virus, a mosquito-borne pathogen. You note that a number of cases of West Nile disease
icang [17]

       First of all, let's think about the scientific method, and its processes of how it works.

       It all starts with observation, so we need to check all the data we have and all the information that can be collected to have a good thought on what's going on.

        After gathering enough information, let's think about a hypothesis that could help solving this problem. Well, reading the question, we can check that that region passed through the wettest summer in 100 years, and that's the main problem here, because before this weather, was this disease a problem? I guess not, so this can be a reason, the change in the percentage of water in the air.

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5 0
4 years ago
Which of the following is the best reason that scientific models are used?
Elodia [21]
<span>The correct answer is b. Option a is incorrect because these models can demonstrate scientific theories, but they don't prove scientific theories (you would need experiments for that). Option c is incorrect because the models aren't always representing something abstract (i.e. DNA is very real, just very small). Option d is incorrect because they don't precisely mimic something in nature, but instead help us visualize something in nature that is difficult to see or comprehend.</span>
3 0
3 years ago
The following table shows the kinds of seed that are commonly eaten by four types of birds. In the table, an X indicates that th
kondaur [170]

Answer: Pigeon X X

Explanation:

Idk?

6 0
3 years ago
Which one of the following criteria is necessary for natural selection to occur
Anna71 [15]
You need to put the answer choices because there is a lot that makes natural selection occur. but without the answer choices i would say a fertile female and made of reproductive age.
8 0
3 years ago
Read 2 more answers
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