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professor190 [17]
3 years ago
9

Does caffein affect a student's typing speed?

Biology
2 answers:
Lilit [14]3 years ago
5 0

Explanation:

Hypothesis : it does affect the typing speed

Variables: type of coffee, amount of caffeine, same time set, same keyboard/computer

BlackZzzverrR [31]3 years ago
4 0

Answer:

Hypothesis

Hypothesis 1:Caffeine is a stimulant and will result in an increase in the typing speed of the participants.

Hypothesis 2:Caffeine is a stimulant and will result in a decrease in typing accuracy.

Hypothesis 3:The heart rate of the people will increase with the intake of caffeine.

Aim of the study

The aim of this study is to determine the following:

• The effect of caffeine on typing speed

• The effect of caffeine on typing and accuracy.

• The effect of caffeine on the heart rate of people.

Explanation:

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Which experiment would most likely contain experimental bias?
Ivanshal [37]

Answer:

B. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands.

Explanation:

In experimental bias the researcher is more likely to attempt to manipulate or produce results that show their work in a positive outcome. In this case, the company is aiming to perform research on their product that goes against their competitors.

UwU

7 0
3 years ago
Create a nucleotide sequence with at least 9 DNA bases. Then, replicate your DNA strand using the appropriate DNA bases.
arsen [322]

Answer and Explanation:

We need to create a nucleotide sequence, but first what are DNA nucleotides? They are the monomers of the entire nucleic acid strand of DNA.

DNA nucleotides have 4 bases: adenine (A), thymine (T), guanine (G), and cytosine (C). When pairing bases, A and T always go together and G and C always go together. (An interesting trick to remember this is Apple in the Tree and Car in the Garage.)

To create our own, we can draw up any combination of A's, T's, C's, and G's. I'm just going to arbitrarily write the following:

A A G C T T C G A T C G A C C

We need to pair these up by replicating it (remember A with T and G with C). The new strand will become:

T T C G A A G C T A G C T G G

Finally, we need to transcribe this back into the original format because replication is creating the same copy of something:

A A G C T T C G A T C G A C C

3 0
3 years ago
Human blood is classified as either Rh+ or Rh-. Blood is also classified by type: A, if it contains an A antigen but not a B ant
Burka [1]

Answer:

yep

Explanation:

its right so pls like the explain

6 0
3 years ago
Why do you think that mimicry and camouflage exist in nature?
Drupady [299]

Answer:

as a defensive mechanism and to hide from prey

Explanation:

3 0
3 years ago
Eukaryotic cells are 10-100 times the size of prokaryotic cells. how do eukaryotic cells resolve the surface area to volume limi
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The surface area of a cell is approximated by the surface area of a sphere, given by the expression, 4πr². The volume of the spherical cell is given by the expression, 4πr³/3. The ratio between surface area and volume turn out to be, 1:r/3, or 3:r. This indicates that the SA/volume ratio is inversely related to the radius of the cell. Greater the radius, lower the ratio. Higher ratios are present in the prokaryotic cells This enables them to exchange food and water from their environment by the simple process of osmosis and diffusion. Eukaryotes have a larger cell radius and size. Thus, eukaryotes find it harder to exchange food and water by simple diffusion, rather they have specialised organelle present in the cell that actively transport food and water into the cell. These specialised organelles help the cell avoid the problem due to small SA/volume ratio.

4 0
4 years ago
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