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Andrei [34K]
2 years ago
15

Did you mean: Mr. Montanari has noticed that there is a wide range of grades that students get on tests, even though they are al

l in the same class. He wonders whether students, who study for 20 minutes per night, every night, get higher scores on tests or not. Mr Montanari wants as many kids to be successful as possible. Pleas help him write a hypothesis about this problem
Biology
2 answers:
ValentinkaMS [17]2 years ago
8 0
I don't know what the is going on here but i'm still a little confused about the idea but i'm still trying for the money
MrRa [10]2 years ago
6 0

Our hypothesis is based on the performance of students in the tests given the amount of time they studied last night before the exam. The testable version of the hypothesis will be whether the students studying 20 minutes per night, every night, get higher scores on the test. To test the hypothesis, Mr. Montanari needs to do a survey of his students to find out the time of study and the duration of study before the examinations. By analysing and interpreting the data, he can either reject or accept the hypothesis. Hypothesis will get rejected:

1.  when there's at least one case where the individual might have not studied before the examination but still managed to score the highest.

2. when there's at least one case where the individual might have studied in the day time but still managed to score the highest.

3. when there's at least one case where the individual might have studied for 20 minutes per night for every night but got an average score in the test.

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Suppose that Gene B occurs in a sea turtle gene pool where the frequency of the B1 allele is 0.5 and the frequency of the B2 all
disa [49]

Answer:

Frequency of the B3 allele = 0.1

Explanation:

The allele frequencies in a given population remain constant which means that every generation will have the same gene pool across the generations. As per Hardy Weinberg’s first equilibrium equation, the sum of frequency of all the alleles at a given locus is equal to one  

Thus, if "p" represents the frequency of B1 allele and "q" represents the frequency of B2 allele and "r" represents the allele for B3 allele. Then, sum or "p", "q" and "r" is equal to one.

p+q+r = 1\\

Substituting the given values, we get -

0.5 + 0.4 + r = 1\\0.9 + r = 1\\r = 1-0.9\\r = 0.1

5 0
2 years ago
The backbone of DNA and RNA is composed of_________ . DNA is double stranded due to interactions between adenine, cytosine, guan
o-na [289]

A sugar-phosphate backbone (alternating grey-dark grey) joins together nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.The two strands run in opposite directions, one going in a 3' to 5' direction and the other going in a 5' to 3' direction. The nitrogenous bases are positioned inside the helix structure like "rungs on a ladder," due to the hydrophobic effect, and stabilized by hydrogen bonding. Uracil is one of the four nucleobases in the nucleic acid of RNA that are represented by the letters A, G, C and U. The others are adenine, cytosine, and guanine. In RNA, uracil binds to adenine via two hydrogen bonds. In DNA, the uracil nucleobase is replaced by thymine. Uracil is a demethylated form of thymine.

hope this helps


4 0
2 years ago
Read 2 more answers
A student reads the article "Autoimmune Diseases Stopped in Mice" and claims that this research will revolutionize
tresset_1 [31]

Answer:

Explanation:

An international team of scientists led by the Lomonosov Moscow State University group made a significant step in creating a new type of drug for treatment of autoimmune diseases, such as rheumatoid arthritis and Crohn's diseaase

4 0
2 years ago
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A personal trainer thinks her clients get better workouts and are stronger if they listen to music while working out. Over the n
katrin [286]

Answer:

The correct answer is: the group of 10 people that lifted the barbell with music is the control group.

Explanation:

The personal trainer made an experiment to test her hypothesis. When experiments are being made, is common to have a control group and an experimental group.

The control group is the one that is subjected to the usual conditions, the group that shows what normally happens. The experimental group is the opposite, this group is observed while it goes through an unusual condition that may impact how they perform in the task observed.

<u>The personal trainer thinks that playing music for her clients is of benefit to them, so we can assume that she always plays music during the workouts, which means that the control group is the one that is listening to music while lifting a barbell</u>. The group that worked out without music is the experimental group because they were the ones that performed that activity with a change in their normal environment.

7 0
1 year ago
A person eats a large pasta meal at lunch and then goes for a run before dinner. Explain how the body taps energy from this star
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Starches help give you an extra boost of energy during your workout. Starches, as well as sugars, eventually break down into glucose -- your body's main fuel source.

Explanation:

When you eat starchy foods, you'll have a supported energy level over a period of numerous hours. This is separate from sugars, which are simple polysaccharides that give you a quick surge of energy but do blank to keep your energy levels running.

5 0
2 years ago
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