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Evgen [1.6K]
3 years ago
10

researchers combined sequences of fruit-fly dna from a gene for particular trait with frog dna .the mixture was heated to separa

te the dna strands .cooling allowed the single strands to for pairs. the researchers observed that some of the fruit-fly dna paired with frog dna .the results provided evidence that —
Biology
1 answer:
pychu [463]3 years ago
8 0

Answer:

The correct answer is - Similar nucleotides are present in both fruit-fly and frog DNA.

Explanation:

Fruit fly or drosophila DNA sequence and DNA sequence of the gene of frog for a particular trait is combined and heated to separate the DNA strands by separating the nucleotides present between the strands of both organisms.

This is observed after cooling down the single strands after paired up that some of the DNA paired with the DNA. This is only possible if the DNA strands of the particular gene have similar nucleotides to form hydrogen bond in single strands of DNA of frog and fruit-fly.

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Dmitry_Shevchenko [17]

Answer:

In this interview for Think magazine (April ’’92), Richard Paul provides a quick overview of critical thinking and the issues surrounding it: defining it, common mistakes in assessing it, its relation to communication skills, self-esteem, collaborative learning, motivation, curiosity, job skills for the future, national standards, and assessment strategies.

Question: Critical thinking is essential to effective learning and productive living. Would you share your definition of critical thinking?

Paul: First, since critical thinking can be defined in a number of different ways consistent with each other, we should not put a lot of weight on any one definition. Definitions are at best scaffolding for the mind. With this qualification in mind, here is a bit of scaffolding: critical thinking is thinking about your thinking while you’re thinking in order to make your thinking better. Two things are crucial:

1) critical thinking is not just thinking, but thinking which entails self-improvement

2) this improvement comes from skill in using standards by which one appropriately assesses thinking. To put it briefly, it is self-improvement (in thinking) through standards (that assess thinking).

To think well is to impose discipline and restraint on our thinking-by means of intellectual standards — in order to raise our thinking to a level of "perfection" or quality that is not natural or likely in undisciplined, spontaneous thought. The dimension of critical thinking least understood is that of  "intellectual standards." Most teachers were not taught how to assess thinking through standards; indeed, often the thinking of teachers themselves is very "undisciplined" and reflects a lack of internalized intellectual standards.

Question: Could you give me an example?

Paul: Certainly, one of the most important distinctions that teachers need to routinely make, and which takes disciplined thinking to make, is that between reasoning and subjective reaction.

If we are trying to foster quality thinking, we don't want students simply to assert things; we want them to try to reason things out on the basis of evidence and good reasons. Often, teachers are unclear about this basic difference. Many teachers are apt to take student writing or speech which is fluent and witty or glib and amusing as good thinking. They are often unclear about the constituents of good reasoning. Hence, even though a student may just be asserting things, not reasoning things out at all, if she is doing so with vivacity and flamboyance, teachers are apt to take this to be equivalent to good reasoning.

This was made clear in a recent California state-wide writing assessment in which teachers and testers applauded a student essay, which they said illustrated "exceptional achievement" in reasoned evaluation, an essay that contained no reasoning at all, that was nothing more than one subjective reaction after another. (See "Why Students-and Teachers-Don't Reason Well")

The assessing teachers and testers did not notice that the student failed to respond to the directions, did not support his judgment with reasons and evidence, did not consider possible criteria on which to base his judgment, did not analyze the subject in the light of the criteria, and did not select evidence that clearly supported his judgment. Instead the student:

Explanation: I have had this one before.

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