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3 years ago

Which of the following is a correct procedure for the operation of a microscope?

1 answer:

4 0

I believe the answer would be option C. You start focusing the knob on low power, and use the other knob on the high-power lens afterward to get the best view of the specimen in the petri dish

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HELP ASAP!!!!

andriy [413]

Answer:

homologous structures

Explanation:

Homologous structures are organs or skeletal elements of animals and organisms that, by virtue of their similarity, suggest their connection to a common ancestor. These structures do not have to look exactly the same, or have the same function.

7 0

2 years ago

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b. In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did t

saveliy_v [14]

Answer:

The initial amount, 1.3 million = 1,300,000 is the 100%.

now, 640,000 is a given percentage (lower than 100%) of that.

How we can find it?

suppose that 640,000 represents an x%.

Then we have that the quotient between the actual quantities and the percentages must be the same

(640,000/1,300,000) = x%/100%

x% = (640,000/1,300,000)*100% = 49.23%

Then the percentage declined is:

100% - 49.23% = 50.77%

The other question can not be answered with the given information.

4 0

3 years ago

Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?

expeople1 [14]

Answer

a balance and a graduated cylinder

Explanation

Density is mass per unit and it is property characteristic of a substance. The arrangement of the mass of atoms and their size is what determines the the density of a substance.

For a student to measure the density of seawater he/she is required to use a balance and a graduated cylinder where a balance will be used to measure the mass of the mineral sample and then a graduated cylinder to determine the volume.

7 0

3 years ago

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What is the approximate age of our solar system?

Nonamiya [84]

<span>What is the approximate age of our solar system?
</span>b. 4.6 billion years

8 0

3 years ago

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A student wonders whether removing the nucleus from a cell would result in a new prokaryotic cell. Why would this procedure fail

Ivenika [448]

Well assuming the original cell is a prokaryotic, you wouldn't be able to remove the nucleus because prokaryotic cells don't have a nucleus to begin with. if this doesn't help then: The cell would lack genetic information.

4 0

3 years ago

Read 2 more answers