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4 years ago

How did Watson and Crick determine base pairing?

1 answer:

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Watson and Crick determine the base pairing with their DNA model in which showed them that the hydrogen bonds could only be created perfectly between nitrogenous bases in the center of the molecule. However, these bonds would only form between adenine and thymine, and cytosine and guanine.

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The exodus of medical professionals from africa to europe is an example of brain drain as it has the potential to __________.

Marat540 [252]

Out of the following given choices;

A) spur economic development in Africa

B) impede economic development in Africa

C) impede economic development in Europe

D) spur economic growth for those medical professionals

The answer is B. Brain drain means a country is losing its professionals to the external market rather than working in the local market due to unfavorable local conditions. The country loses because it has few medical professionals to treat its people hence it carries a higher burden of diseased people. Additionally, to cater to this gap, it has to import these medical services which is more expensive than keeping local talent.

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3 years ago

A family wants to determine how much of the total monthly income is going to various expenditures (food, housing, utilities, etc

timurjin [86]

I'm not a hundred percent sure, but I would say bargraph's or circle graphs are definitely the most efficient.

8 0

4 years ago

Read 2 more answers

True or false : viruses are classified by scientists as living things .

Yuki888 [10]

Your answer should be False.

Most biologists say no. Viruses are not made out of cells, they can't keep themselves in a stable state, they don't grow, and they can't make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms. (Khan Academy)

Hope this helps! =^-^=

6 0

3 years ago

Read 2 more answers

1. You are tracking two genes in drosophila (body color and eye color). To determine whether the traits are on the same chromoso

levacccp [35]

Answer:

Phenotypic ratio:

In this cross among 16 offsprings,

4 offspring phenotypically produced (w+wb+b) Orange body & Red eyes

4 offspring phenotypically produced (w+wbb) Orange body & Brown eyes

4 offspring phenotypically produced (wwb+b) White body & Red eyes

4 offspring phenotypically produced (wwbb) White body & Brown eyes

Proportion is: 4 : 4 : 4 : 4

Explanation:

Orange body & Red eyes (w+/w;b+/b) x White body & Brown eyes (w/w;b/b)

w+wb+b × wwbb-----------(1)

Chromosomes become half and alleles become separated. Gametes produced from each organism due to meiosis are shown below.

w+b+, w+b, wb+ and wb × wb, wb, wb and wb--------------(2)

Mating of these alleles are represented below in the form of checkerboard.

w+b+ w+b wb+ wb

wb w+wb+b w+wbb wwb+b wwbb

Answer

Phenotypic ratio

In this cross among 16 offsprings,

4 offspring phenotypically produced (w+wb+b) Orange body & Red eyes

4 offspring phenotypically produced (w+wbb) Orange body & Brown eyes

4 offspring phenotypically produced (wwb+b) White body & Red eyes

4 offspring phenotypically produced (wwbb) White body & Brown eyes

Proportion is: 4 : 4 : 4 : 4

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3 years ago

How would you distinguish between the anatomical neck and surgical neck of the humerus?.

gulaghasi [49]

Answer:

The head, which is the top of the bone that fits into the shoulder joint. ... The anatomical neck is the portion that lies just below the head. As the neck continues along the humerus body, it is called the surgical neck (so named because this is the location of many fractures that require surgery)

Explanation:

6 0

3 years ago