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EleoNora [17]
3 years ago
9

What are the two alleles for tongue rolling?

Biology
1 answer:
Luba_88 [7]3 years ago
7 0
I think t or r............
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What are the benefits of scientists using the metric system worldwide?
Basile [38]

Answer;

-Reduce the chance of errors in correspondence

-Easier to use for converting between units while measuring

-Make communication easier between scientists comparing data

Explanation;

-The metric system is a system that is based on joining one of a series of prefixes, including kilo-, hecto-, deka-, deci-, centi-, and milli-, with a base unit of measurement, such as meter, liter, or gram.

-Since the metric system is a decimal system of weights and measures it is easy to convert between units simply by multiplying or dividing by 10, 100, 1000, etc.

-It is an alternative system of measurement used in most countries, as well as in the United States.

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3 years ago
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The role of a radula is to bring oxygen into the animal. true of false
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True...........................
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3 years ago
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How is it possible that over 20 million living organisms on the planet are made up of only 5 types of nucleotide based arranged
almond37 [142]

Answer/Explanation:

The DNA in all living organisms is made up of 4 bases, adenine, thymine, guanine, cytosine. The RNA replaces thymine with uracil, making 5 types of nucleotide. The number of nucleotide pairs in a genome can range from half a million up to 100,000 million - meaning there are an exponential number of combinations of these 4 bases.

Imagine an organism exists that has only 2 nucleotides (<u><em>this is over 200,000x smaller than even the smallest bacterial genome</em></u>). If we allow any nucleotide at each of the 2 positions, then we have 4x4 (4²) or 16 possible combinations of sequences. For a nucleotide length of 4, the total number of possible combinations are 4⁴ or 256.

Since we are dealing with many millions of nucleotides, there are essentially infinite combinations of nucleotides, giving rise to the variation that produces over 20 million organisms on the planet.

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3 years ago
Why does a bird egg need to be poruos​
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Dont know..........-****

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The process of determining the preferred number and spacing of children in one's family and choosing the appropriate means to ac
kozerog [31]
The answer for the question is Family planning.
Family planning allows people to attain their desired number of children and determine the spacing of pregnancies. It is achieve through use of contraceptives methods and the treatment infertility. They are different methods of contraception, including long-acting reversible contraception such as IUD, hormonal contraception such as pill among others. 

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