List and describe the four types of micro-organisms that cause disease

1 answer:

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Virus: an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.
Bacteria: a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some which can cause disease.
Fungi/fungus: any of a group of spore-producing organisms feeding on organic matter, including molds, yeast, mushrooms, and toadstools.
Protozoa: a phylum or group of phyla that comprises the single-celled microscopic animals, which include amoebas, flagellates, ciliates, sporozoans, and many other forms. They are now usually treated as a number of phyla belonging to the kingdom Protista.

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SIMPLE STAINING OF BACTERIA AND YEAST

grin007 [14]

For staining flagella of bacteria use actively motile organisms 20 to 24 hours old, allow to diffuse in sterile water 20 to 30 minutes, transfer droplets of the suspension to clean slides and let evaporate without spreading. Then treat 2 to 4 minutes with the following mordant: tannic acid 10 or 20%, 50 cc.; ferric chloride 5%, 10 to 15 cc.; carbol fuchsin (Ziehl-Nielson), 5 cc.; hydrogen peroxide 3%, 6 to 8 cc. Wash and stain 2 to 3 minutes with a mixture of basic fuchsin, saturated alcoholic, 10 cc.; anilin oil (1 part) and 95% alcohol (3 parts) mixed, 5 cc.; distilled water, 30 cc.; acetic acid, 4%, 1 cc. Wash thoroly with water.

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2 years ago

A professor of biology has completed an experiment on speciation. The results indicate that the current understanding of how spe

Mazyrski [523]

Answer:

The most appropriate way of sharing the results is to publish in a scientific journal for peer review. So the answer is 'B'.

Explanation:

In order to validate your results in the scientific community, it is best to publish in a scientific journal and get it peer reviewed. When the article is peer reviewed, other scientists of higher caliber verify your experiment and results and then give their verdict to the outside world.

Newspapers sometimes also publish rumors. So there is no guarantee what gets published is true. the students are still learning and cannot appreciate the full extent of your work.

8 0

3 years ago

A scientist studies the formation of the protein hemoglobin. Arrange the labels to complete the steps for the formation of hemog

julsineya [31]

Correct Answer:

C, D, A, B

Explanation:

I took the test using the person's above answer, got 2 wrong, therefore it's C, D, A, B, instead of C, A, D, B.

I hope this helps