The answer is 2. As seen in the illustration below, the wing of the wasp measured from 1.5 3.4 cm giving it the difference of 1.4cm.

2

The answer is 2. Staining makes a specimen more visible, specifically the parts of the specimen. This is done to identify different structures.

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The answer is 2. In order to view a much more detailed image of the part or specimen, switching to high power view is the technique done. In the high power view, the image of the specimen or the part of the specimen that you want to explore must be placed in the middle of the view.

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The answer is 2. An indicator is a special tool used to identify the presence of a certain chemical. This tool can either be in a form of paper or chemical that would react to a solution once it has detected the presence of that chemical.

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The answer is 2. To perform the correct procedure for heating test tubes, the test tube must be pointed away from the student as well as away from other students and the student must be wearing goggles.

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The answer is 2. The image, when switched to a high power objective, would be reversed and inverted.

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The answer is 2. Since the illustration showed that the three single cells had a total of 1.5mm, we could divide it by 3 in order to know the length of each single cell, thereby giving us answer of 0.5mm each cell. If 1mm is equal to 1000 micrometers, 0.5mm will be equal to 500 micrometers.

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The answer is 1. Gel electrophoresis is used scientists or researchers to cut and put DNA or RNA into fragments and place them in a gel in order for them to study easier.

1

The answer is 3. The first thing you need to do after being put a chemical in the eye accidentally is to wash off the chemical with running water while simultaneously letting the attendant in charge of the lab know.

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An indicator is a special tool used to identify the presence of a certain chemical. This tool can either be in a form of paper or chemical that would react to a solution once it has detected the presence of that chemical. The two solutions may differ in that one solution may have a change in color due to the presence of protein that has reacted to the chemical or indicator put inside of it and the other solution would not have any change.

To perform the correct procedure for heating test tubes, the test tube must be pointed away from the student as well as away from other students and the student must be wearing goggles.

The answer is 3. This procedure allows a researcher to stain the specimen even in the presence of a cover slip. The paper towel absorbs the excess stain of the specimen.

3

This part of the microscope is called the fine adjustment. This functions to focus on the specimen when using high power and to sharpen the specimen when using low power. One important function of this part is also to observe or see the different layers of the specimen.

The answer is 2. When using graduated cylinders, the appropriate way to measure a liquid is by identifying the lower meniscus. This is the basis of the exact measurement of the liquid placed inside the graduated cylinder.

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The answer is 3. Since the third choice has the biggest image. Choice 2 and 4 are just magnified views of choice 1 and 3 respectively.

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The answer is 4. As seen in the key diagram, the male mosquito has a bushy antennae while in the male, it is not bushy.

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Th answer is 1. The antennae, palsp and proboscis are the ones that make the anopheles identified from the others. The palps of an anopheles is as long as the proboscis.

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The answer is 4. The aedes mosquito has no hair on the legs, the palp is longer than the antenna and the proboscis is much shorter than the palp.

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Gel electrophoresis is used scientists or researchers to cut and put DNA or RNA into fragments and place them in a gel in order for them to study easier.

Individuals W and Z almost have the same genetic similarity as compared to the other two individuals, W and Y.

The answer is 3. Gel electrophoresis is used scientists or researchers to cut and put DNA or RNA into fragments and place them in a gel in order for them to study easier.

3

Gel electrophoresis is used scientists or researchers to cut and put DNA or RNA into fragments and place them in a gel in order for them to study easier. In the illustration, the smaller fragments would be located in the wells but only on one side of the gel.

In chromatography, an important matter to watch out would be the pigment mixture spots. The spot must not touch the solvent in the tube or beaker because this would wash away the ink. The error in this setup is the mixture spot touching the solvent.

A safety precaution inside a laboratory while performing an experiment would be to not taste or eat the samples obtained. This is to make sure that no student would be harmed. The chemicals could poison the students.

Gel electrophoresis is used scientists or researchers to cut and put DNA or RNA into fragments and place them in a gel in order for them to study easier. In the illustration, the smaller fragments would be located in the wells but only on one side of the gel.

Given the illustration, we can see that the two bears most closely related to each other is bears 1 and 3.

1 and 3

One additional way to determine the evolutionary relationship of these bears would be by tracing the genetic lineages of all bears.

Another example of separating molecules in a liquid mixture would be by filtration. It is a common technique used to separate molecules from a liquid content.

Dichotomous key