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SashulF [63]
3 years ago
11

Professor Binkie has been studying how playing video games affects a student's performance on the SAT. Using 5,000 students, the

Professor is monitoring the amount of time they play the video games and how they score on the test. Which of these would be a variable that Professor Binkie would be unable to control during his research? A) total number of students B) numbers of boys and girls C) what date they will take the SAT D) how hard the students try on the SAT
Biology
2 answers:
JulijaS [17]3 years ago
8 0
D, how hard the students try on the SAT seems the most reasonable.
borishaifa [10]3 years ago
8 0

Answer: Option D

Explanation:

The variable that can be controlled is known as controlled variable. But everything is not under control while performing an experiment.

The variable that can be controlled during the time of experiment is number of boys and the number of girls, the SAT that they will choose and total number of students.

The efforts that the students will put on SAT cannot be controlled. This is a factor which can hamper the result of the experiment.

So, option D is the correct answer.

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Which of the following happens to large molecules during digestion?
mel-nik [20]

Answer:

large intestine

Explanation:

Through digestion, large food particles are converted into smaller components that can be readily absorbed into the bloodstream. Sucrose binds to the active site on sucrase, and this puts stress on the bond between the 2 sugars that make up sucrose. The bond breaks, releasing glucose and fructose.

6 0
3 years ago
At first glance, fermentation of pyruvate to lactate appears to be an optional add-on reaction to glycolysis. After all, could c
Serhud [2]

Answer:

No, glycolysis can not be continued without fermentation in the absence of oxygen.

Explanation:

In the absence of oxygen, cells perform fermentation to oxidize NADH into NAD+. NAD+ is required during the conversion of glyceraldehyde 3 phosphate into 1,3 bisphosphoglycerate. Fermentation reduces pyruvate and oxidizes NADH so that the NAD+ supply is continued to ensure continuity of glycolysis.

If fermentation does not occur under anaerobic conditions, cells will accumulate pyruvate and NADH. Glycolysis could not be continued in the absence of NAD+.

8 0
3 years ago
The analysis of a DNA molecule reveals that 30% of its nucleotides are adenine. What percentage of the same DNA molecule would b
Contact [7]

Answer: 20%

Explanation:

Recall that the sum of all nitrogenous bases is equal to 100%.

Hence: A + C + G + T = 100%

Now, since adenine nucleotides is 30%, then thymine is 30% as well (A = T). Thus, the total of both is 60%.

From 100 remains 40% which is divided equally between guanine and cytosine, so each is 20%.

Thus, the percentage of the same DNA molecule that would be expected to be guanine nucleotides is 20%

6 0
3 years ago
When the cap of an average gilled mushroom is cut off and shaken, a cloud of powdery material is released. The material released
lys-0071 [83]

Answer:spores

Explanation:

Fungi are eukaryotes .they do not possess chloroplast.as a result they

are heterotrophs that feed on dead and decaying matter.mushrooms are a type of fungi. They consists of individual filaments collectively called hyphae, which form the mycellium. They form visible fruiting bodies above the ground. This body is umbrella shaped and is called the pileus.

Underneath the pileus are gills ,from where the spores drop.

Mushrooms produces spores as a means of reproduction. When the spores are released ,they are carried by agents of dispersal such as water,air etc.when fall on favourable substrates, they germinate to form a single hyphae which then branches to form mycellium.

7 0
3 years ago
Which type of coral reef has a shallow backreef zone?
Basile [38]

Answer:

fringing reef

Explanation:

one of the 3 main types of coral reefs. it has either no back-reef zone or a shallow one. they are typically shore-attached.

7 0
3 years ago
Read 2 more answers
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