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satela [25.4K]
2 years ago
15

Could a teacher use ink chromatography to determine whether or not a student has changed his or her answers after a test has bee

n graded and returned? Explain your answer.
Biology
1 answer:
USPshnik [31]2 years ago
8 0

Answer:

Yes, ink chromatography can be used by the teacher to find out whether or not a student has changed answers after a test has been graded.

Explanation:

Ink chromatography is a procedure of separating out of the desired ink from the mixture of various other types of inks or dyes.  When any ink is mixed with any solvent meant for it, then it dissolves and may be distinguished from the other ink. Also another fact is helpful, which indicates that some ink are water soluble and some are alcohol soluble. Different types of ink pen uses various types of inks, when this is mixed with certain solvents the components of the mixture thus obtained forms a banding pattern which is very unique to that particular. This is also called ink chromatograph.

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In a population of tomato plants mean fruit weight is 60 g and narrow-sense heritability (or realized heritability - h2) is 0.3.
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Answer:

The mean weight of the progeny is 66 grams

Explanation:

Given -

Mean fruit weight of tomato plant (M1) = 60 g

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h_2 = \frac{M_2 - M_1}{M_0 - M_1}

Substituting the given values in above equation, we get -

0.3 = \frac{M_2 - 60}{80 -60} \\0.3 = \frac{M_2 -60}{20} \\6 = M_2 -60\\M_2 = 6 + 60\\M_2 = 66

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2 years ago
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Australopithecus is an ape that lived in trees, but could walk on two feet. How might fossils from Australopithecus provide evid
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High Density Lipoproteins (HDL), also known as the good cholesterol acts as a scavenger carrying LDL away from the arteries and back to the liver where the LDL is break down and passed from the body.

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