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In-s [12.5K]
3 years ago
12

Match the staining techniques with their purpose.

Biology
1 answer:
Dennis_Churaev [7]3 years ago
5 0

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.

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lozanna [386]

Answer:

During mitosis, when the nucleus divides, the two chromatids that make up each chromosome separate from each other and move to opposite poles of the cell. ... Mitosis actually occurs in four phases. The phases are called prophase, metaphase, anaphase, and telophase.

Explanation:

I hope this helps :))

(This is from google)

7 0
3 years ago
What is the effect of alcohol administration on the frequency of Daphnia heart contractions and how does this effect of alcohol
Natalija [7]

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to prevent bacteria and viruses

4 0
3 years ago
Identify the correct statements about Lesch-Nyhan syndrome.
Misha Larkins [42]

Answer:

a.

c.

Explanation:

Lesch Nyhan syndrome is characterized by behavioral and neurological abnormalities, and excess uric acid production in the body. It occurs in males, almost exclusively.

Changes (mutations) in the HPRT1 gene causes Lesch Nyhan syndrome and is inherited in a recessive X-linked way. Several symptoms of Lesch Nyhan syndrome are Inflammatory arthritis (gout),  involuntary movements, self-injury and kidney stones.

Hence, the correct option are a. and c.

4 0
3 years ago
I need help with this
Kazeer [188]
Id say C. It makes the most sense to me.
7 0
3 years ago
Cutting down forests changes the populations of more than trees. Imagine the organisms that lived in this forest. After the tree
Alex_Xolod [135]

Answer:

<em>Food and shelter are the most likely limiting factors in this case.</em>

Explanation:

In a forest, the huge trees act as a source of shelter for the animals that live in that habitat. It protects the animals from the heat of the Sun and extreme cold conditions.

The tress in the forest are the primary source of food for almost all the organisms that live in the forest. Cutting down trees will lead to food scarcity for the animals which inhabit that forest. As a result, the animals will either have to migrate or they will become die due to lack of food.

Hence, food and shelter are the limiting factors in this case.

6 0
2 years ago
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