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blagie
4 months ago
12

A student is conducting their science experiment on the effect of caffeine on dogs. He has 3 groups of test subjects. The 1st gr

oup of dogs receives plain water. The 2nd group of dogs receives 10 mg of caffeine each, and the 3rd group receives 50 mg of caffeine each. He will measure their activity levels by recording how long each dog runs without stopping, after giving them the pills. What is the independent variable in this experiment?
Biology
1 answer:
garik1379 [2K]4 months ago
5 0

The independent variable in an experiment is the one that is deliberately modified or adjusted in order to observe its effects.

In this case, the varying amounts of caffeine administered to the dogs are the factor that changes—the control group receives no caffeine, the second group gets 10 mg of caffeine, while the third group gets 50 mg of caffeine each.

Thus, the amount of caffeine given to the dogs is the independent variable being altered.

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Can we still recover the lost biodiversity? Why or why not?
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Yes, recovery is possible. However, it will not be identical to what it was previously. We might need to create a new ecosystem by planting trees and rehabilitating the area. The decline in biodiversity affects human health significantly and increases the presence of disease-carrying animals within local populations. Furthermore, habitat fragmentation leads to humans having more frequent interactions with these species that spread disease. Engaging in biodiversity conservation involves recognizing vital wildlife habitats for endangered species and the threats they face. It’s also recommended to keep vehicles on main roads to mitigate the spread of weeds and minimize wildlife disturbances. Additionally, it’s essential to monitor how pets impact biodiversity.

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8 0
3 months ago
The mitotic spindle plays a critical role in which of the following processes? separation of sister chromatids dissolving of the
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The process involves the separation of sister chromatids.
7 0
2 months ago
Sarah wants to know which brand of nail polish lasts the longest without chipping.She buys 4 types of nail polish - Essie (which
s2008m [2378]

Answer:

Various brands of nail polish utilized by Sarah.

Explanation:

In conducting an experiment, two variables are assessed; these are the independent variable and the dependent variable. The variable that is altered consistently to observe its effects is identified as independent variable while the one under examination is termed the dependent variable.

In this scenario, Sarah aims to determine which nail polish brand lasts longest without chipping. Thus, the diverse brands of nail polish she experiments with are designated as the independent variable.

7 0
2 months ago
What reducing sugar, or sugars, would you expect to be produced during chewing?
s2008m [2378]

Answer:

Benedict's Reagent: A Test for Reducing Sugars In the laboratory, we employed Benedict's reagent to detect a specific reducing sugar: glucose.

Explanation:

5 0
3 months ago
Convert enzyme concentrations of 2.5%, 5.0%, and 10% to ppt units.
lana [2441]

Answer:

2.5 x 10¹⁰ ppt

5.0 x 10¹⁰ ppt

1.0 x 10¹¹ ppt

Explanation:

The term ppt denotes parts per trillion, meaning how many parts of the enzyme are present in 1 trillion parts. Percentage denotes the number of parts per 100 units. To convert the provided values from percentage to ppt:

\frac{2.5}{100}=\frac{a}{1,000,000,000,000}\\a=2.5 *10^{10}\ ppt\\\\\frac{5.0}{100}=\frac{b}{1,000,000,000,000}\\b=5.0 *10^{10}\ ppt\\\\\frac{10}{100}=\frac{c}{1,000,000,000,000}\\c=1*10^{11}\ ppt

The concentrations in ppt are:

2.5 x 10¹⁰ ppt

5.0 x 10¹⁰ ppt

1.0 x 10¹¹ ppt

7 0
4 months ago
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