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Mars2501 [29]
3 years ago
12

Rick’s class plans to study the effect of eating different breakfast foods on grades in morning classes. Students in the class w

ill be the test subjects for the investigation. Which of the following would most likely make the results of the experiment invalid?
Biology
2 answers:
malfutka [58]3 years ago
4 0

The thing that would mostly make the results of the experiment invalid would be the students themselves. No one is built the same, and the exact same food can have very different effects on different people.

il63 [147K]3 years ago
4 0

Hello. This question is incomplete, answer options are missing. The options are:

"a)Half of the students ride the bus to school, and half ride in cars.  b)Some students eat breakfast two hours before other students do.  c)Some students miss school during the investigation due to illness.  d)All students in the investigation have morning classes in the same subjects."

Answer:

b)Some students eat breakfast two hours before other students do.

Explanation:

In a scientific experiment like the one shown in the question above, it is essential that students show no variation in the times they eat. This is because any variation would lead to differences in the digestion of each student and would result in an inaccurate and unreliable result.

More fully explained, we can say that if some students ate two hours before other students, the research could be invalid. This is because students would have different stages of digestion and this would not allow them to evaluate the effects of eating different breakfast foods on morning class notes.

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Answer:

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The overall reaction can be written as:

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Contrary, in anaerobic bacteria respiration takes place by using electron acceptor other than oxygen such as sulfate, nitrate, sulfur, fumarate etc. Hence, electrons are passed through a electron transport chain which are finally accepted by any molecule other than oxygen.

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3 years ago
Analysis of a blood sample from a fasting individual who had not eaten for 24 hours would be expected to reveal high levels of _
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Analysis of a blood sample from a fasting individuals who had not eaten for 24 hours be expected to reveal high levels of glucagon .

Hence the option B is correct .

<h3>What is glucagon ?</h3>

Glucagon is on of the natural hormone of the body .it is peptide hormone.

It is produced by alpha cells of the pancreas .

It controls bodily function which include it controls the glucose level in our body .

It will release in the response to drop in blood sugar due to prolonged fast ,exercise and protein rich meals .

Hence , OPTION B is correct .

Learn more about glucagon here :

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Answer:

The answer is explained below;

Explanation:

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It is a biopolymer molecule consists of many nucleotide monomers that are covalently bonded to form a chain. The examples of polynucleotides  are DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) in which four nitrogenous bases are present i.e., in DNA they are guanine, adenine, cytosine and thymine and in RNA, uracil is used instead of thymine.  

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It is a short unbranched chain of amino acid sequence linked together by peptide bonds between the amino and carboxyl groups of adjacent amino acids. The different peptides are dipeptides, tripeptides, tetrapeptides, etc and proteins are made by one or more polypeptide chains that support the cell structure.

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It is the simplest form of sugar which consists of carbon, hydrogen, and oxygen atoms and cannot be broken down further. It is the building block of polysaccharides and includes aldoses, ketoses, etc.  

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Polysaccharides (oligosaccharides) are long-chain polymers formed by joining of monosaccharides together by glycosidic bonds. The examples of polysaccharides are cellulose (structural polysaccharide in plants), glycogen (the storage form of glucose in the human liver and muscles), starch (energy source obtained from plants), etc.

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