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1 year ago

Experimental vs control group:

1 answer:

6 0

When conducting an experiment, the control group does not receive the treatment, while the experimental group is exposed to it. Individuals from both groups come from the same population.

<h3>What are the control group and the experimental group?</h3>

During an experiment the researcher compares at least two groups: a control group and an experimental group.

Both of them are composed of individuals coming from the same population, so they are identical in all aspects except for the independent variables.

Both groups must be similar in every variable that might influence the results, except for the study treatment.

The control group is the one used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.

It is useful to have a control group to observe how it responds when no treatment is applied.

The independent variable always keeps constant in the control group.

The experimental group is subjected to the effects of the treatment.

The researcher applies different treatments to the experimental groups to analyze their response.

The researcher voluntarily changes the values of the independent variable to observe how it affects the individuals subjected.

There can be several experimental groups.

In conclusion, the control group does not receive the treatment, while the experimental group does.

You can learn more about the control and experimental groups at

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In a dihybrid cross involving two autosomal traits on different chromosomes in which the parents are purebred for the opposite f

Simora [160]

Answer:

The question lacks options, the options are:

A) 1 out of 16

B) 3 out of 16

C) 6 out of 16

D) 9 out of 16

The answer is 1 out of 16

Explanation:

This is a DIHYBRID cross because it involves two different genes coding for distinct traits. One of the traits will be dominant while the other recessive. Hence, parents that are purebred for opposite forms of the trait means that one parent is homozygous dominant while the other is homozygous recessive. When these two parents cross, they produce F1 offsprings that all possess the dominant trait but heterozygous/hybrids.

When these hybrids are self-crossed, they produce four different combinations of gametes which when crossed using a punnet square will result in F2 offsprings with a 9:3:3:1 phenotypic ratio according to Mendel's observation.

9 represents offsprings that are dominant for both traits

The two 3's represents offsprings that are recessive for one trait and dominant for the other respectively.

1 represents offsprings that are homozygous recessive for both traits.

Hence, 1 out of 16 offsprings will be homozygous recessive for both traits.

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3 years ago

What can be done in the future for the greenhouse effect?

andrezito [222]

Second thoughts:

I don't think doing anything in the future will be of use, because we should have already done it, and we didn't, so we have to do it now.

And what we should do is:

To find and actually use and apply new energy sources.

To do more (or less, depending on what the problem is).

To clean the mess we have done / recover the gap in the ozone layer /fix the damage that we have caused.

If you're interested:

I don't think protesting (like we're currently doing) will be of help for two simple reasons:

1. - I don't know for sure, but I don't think politicians care, like or pay attention to protests (unless it's something like the Yellow Jackets).

2. - The time we spend protesting is more valuable than we think. We should leave that aside.

Hope it helped,

BiologiaMagister

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2 years ago

A group of hikers find a fallen tree in a forest. The dead tree trunk is covered by mushrooms and other fungus. Later, they find

Evgen [1.6K]

D! They are both decomposing dead organic matter and metabolizing it through certain pathways to obtain energy! Hope this helped :)

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2 years ago

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To understand the chemical basis of inheritance, we must understand the molecular structure of DNA.

earnstyle [38]

Answer:

C) reductionism

Explanation:

The approach of reductionism is applied to decipher the basic concepts that rule some complex life processes. In this approach, the complex life processes can be interpreted by explaining the physical and chemical structure of involved components and their interactions. DNA molecules store genetic information. Inheritance means the transfer of genetic traits from one generation to the next. Therefore, the chemical structure of DNA is the application of reductionism to understand the chemical basis of inheritance.

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