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Varvara68 [4.7K]
3 years ago
11

Identify the seven properties that all living organisms share

Biology
1 answer:
tino4ka555 [31]3 years ago
3 0
Nutrition, respiration ,growth excretion, homestais, reproduction, movement, and sensitivity
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Using at least 3 steps explain how to make a wet mount slide with an Elodea plant​
Masja [62]
Step One - Obtain a clean microscope slide.

Step Two - Place a drop of liquid on the slide. This is the “wet” part of the wet mount. The liquid used depends on the type of cell being viewed:
If examining a plant cell, tap water can be used.
If examining an animal cell, physiological saline (or contact lens solution) must be used, because if plain water is used, the cell will explode from osmotic pressure. Unlike plant cells and bacteria, animal cells have no cell wall to structurally support them.

Step Three - Obtain the specimen to be used. Some introductory biology classics for viewing include:
Skin of an onion bulb: In order to view the cells, a very thin layer of skin must be obtained. Take a single layer of onion and bend it towards the shiny side. After it snaps, pull gently, and a transparent layer of skin, similar to Scotch tape, will appear.
Elodea leaf: Elodea leaves are two cell layers thick. The cells in one layer are smaller than the cells in the other, so elodea leaves can be used to better understand a microscope's depth of field.
Cheek cells: Human epithelial cells can be obtained by gently rubbing a toothpick on the inside of the mouth, and then swirling the toothpick in the physiological saline on the slide.
Pond water: Obtaining some water from a pond makes wet mount preparation a breeze, since the water and the specimens are both included.
Hope this helps
8 0
3 years ago
What were j.p morgans major areas of buisness
tekilochka [14]
John Pierpont Morgan<span> Sr. (April 17, 1837 – March 31, 1913) was an American financier and banker who dominated corporate finance and industrial consolidation in late 19th and early 20th Century United States.</span>
7 0
3 years ago
A plasmid used in recombinant DNA cloning must contain
oksian1 [2.3K]

Answer:

D. Multiple antibiotic resistance genes.

Explanation:

A plasmid with multiple antibiotic resistance genes is important during cloning as it helps in selectivity of the specific clones during transformation of bacteria.  

7 0
3 years ago
The element oxygen, represented by the symbol O, is classified as
Kipish [7]

Answer:

the element oxygen , represented by the symbol o, is classified as a pure substance

4 0
3 years ago
Help me!! Suppose you must design an experiment to test how a paper airplane's shape affects the distance it will fly. Your plan
Mandarinka [93]

Explanation:

Make a standard, "dart" design paper airplane

Fold your paper into the basic dart paper plane. Fold carefully and make your folds as sharp as possible, such as by running a thumbnail or a ruler along each fold to crease it. Do not bend up the edge of the wings

Throw the plane at least four more times. Each time before you throw the plane, make sure it is still in good condition (that the folds and points are still sharp). When you toss it, place your toe on the line and try to launch the plane with a similar amount of force, including gripping it at the same spot.

Once you have a good idea of how far your plane typically flies, change the plane’s shape to increase how much drag it experiences. To do this, cut slits that are about one inch long right where either wing meets the middle ridge. Fold up the cut section on both wings so that each now has a one-inch-wide section at the end of the wing that is folded up, at about a 90-degree angle from the rest of the wing.

Make paper planes that are different sizes and compare how well they fly.

Try making paper planes out of different types of paper, such as printer paper, construction paper and newspaper. Use the same design for each.

Some people like to add paper clips to their paper planes to make them fly better. Try adding a paper clip (or multiple paper clips) to different parts of your paper plane (such as the front, back, middle or wings) and then flying it

I hope i helped

3 0
3 years ago
Read 2 more answers
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