How could you use a microscope to help determine whether a specimen is a living or nonliving thing

1 answer:

7 0

Whether living or non living:
When you put a sample of tissue under a microscope, if u can see a cell membrane, and can identify some cell structures like nucleus, mitochondria, vacuoles etc. , it was living, if not, its a non living thing.

However some cells don't have a nucleus( eg. prokaryotic cells), but all cells have a cell membrane or some sort of protective covering to contain the cell's insides. 

To check if your specimen maybe-once living, maybe-still living "something", is living, get a look at it through an electron microscope - thats the best microscope ever- and see if the mitochondria's making any ATP( adenosine triphosphate, source of energy for most organisms), if it does, its living. If not, non living. :)

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In 1918, the Russian Tsar Nicholas II was deposed, and he and his family were reportedly executed and buried in a shallow grave.

GaryK [48]

Answer:

By making a paternity test by Short tandem repeats, or STRs (microsatellites).

Explanation:

Short tandem repeats, or STRs, are microsatellites consisting of repeated sequences of 2 to 6 base pair length monomers in tandem, and most of them have a high degree of polymorphism. Half of an individual microsatellites are inherited by each parent, and they can be assesed by PCR amplification and further electrophoresis.

In this case, you would try to recover a bone from the remainings of the woman, the Tsar and his wife, since the rest of the latest were in a shallow grave with many different individuals. Preferably, you should manipulate this samples in an ancient DNA facility (aDNA) with proper techniques. You clean the bone samples, drill them, and from internal bone powder make a DNA extraction. After this, you perform a series of PCR targeting a panel of STRs, and electrophoresis. If the woman claim is true, half of her microsatellites should have correspondence with the Tsar, and half with the ones of his wife.

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4 years ago

Natural selection cannot occur without what

stealth61 [152]

Hello.

There are a couple things needed for natural selection.

Natural selection is organisms become comfortable and changer where they are newly located. Where they can live and get more off springs.

First, You will need heredity which passes traits to an offspring.

Second, reproduction that is needed to to copy traits and give them to the offspring.

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3 years ago

1) A region of the country is rapidly growing in population, causing the demand for electricity to go up each year. As a result,

katovenus [111]

Answer:

1- D

2- A

Explanation:

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2- not sure

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vitfil [10]

The answer to this is D, diffraction.

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The tiles below show several organisms that can be found in a desert ecosystem. Arrange the organisms in order of energy transfe

timofeeve [1]

Hello! I'm did a unit similar to this! I believe the order is
Plant
Grasshopper
Mouse
Snake
Hawk
The plant is at the bottom of the food chain, because it provides energy, or nutrients, for other small organisms such as a grasshopper. The same goes for the grasshopper and the mouse, the mouse and the snake, and it keeps going till the hawk.
The plant is considered a primary producer, because it provides energy for the grasshopper. However, the hawk is at the top of the food chain, because he is predator. In a way, he can be considered a producer for much bigger animals, but in this case, the hawk is at the top of this chain because he is the main predator in this situation.

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