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krok68 [10]
3 years ago
13

2. List out the major 3 layers of the earth?

Biology
2 answers:
Tpy6a [65]3 years ago
6 0

idk idk idk idk idk idk idk idk

Vera_Pavlovna [14]3 years ago
4 0

Answer:

Crust, Mantle, Core

Explanation:

The core is the outer and mantle is the melting rocks and core is a hot rock the is like lava.

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Match the staining techniques with their purpose.
Dennis_Churaev [7]

A Negative stain such as India ink or Congo red-Look for the presence of a capsule.

This stain method is usually used to stain the area around the microorganism.

B The Gram stain-Divide bacteria into two groups based on cell wall structure (thick vs. thin).  

This is type of differential staining used to distinguish organisms based on their staining properties. Gram + and Gram- bacteria stain different because of different cell wall structure.

C The Ziehl-Neelsen Acid-fast stain- Identify bacteria with waxy cell walls such as: Mycobacterium tuberculosis (the cause of TB).  

This is also differential staining method which uses heat and phenol to derive dye into the cells with lipid-rich walls.

D Simple stain with a basic dye-Stain microbes a bright color to make it easier to see them in bright field microscopy.

One dye is used in simple staining in order to determinate the size, shape and arrangement of the cells.

E The Schaeffer-Fulton Endospore stain-Identify Bacillus or Clostridium species, such as the causative agents of anthrax, botulism, tetanus and gangrene.  

This is a special type of staining only used for the bacteria that can form endospores. Bacteria are first treated with heat and then with malachite green, which is very strong stain that can penetrate endospores.

5 0
4 years ago
How will gene therapy be used in the future?<br><br> Please help me <br> Thank you
expeople1 [14]

Answer:

I think to create new medical procedures

Explanation:

4 0
2 years ago
Which tool did Maurice Wilkins use when studying DNA?
Yanka [14]

Answer:

B

Explanation:

Xray Machine

7 0
3 years ago
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Why are groups of small cells better than one large cell at moving material in
quester [9]

Answer:

C. They have a greater surface-to-volume ratio.

Explanation:

Because these smaller cells can access and pass through the membranes of the other cell membranes and permeable coverings easily and voluntarily unlike larger cells. It is also efficient for these smaller cells to penetrate and travel, delivering and transporting goods and materials such as nutrients, oxygen and waste throughout the body without consuming enough energy and conserving lesser space.

For simple reasons, they are faster, more efficient and consumes little space, and most especially depletes lesser energy. So, many small cells have more surface area than one large cell.

5 0
3 years ago
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