Escherichia coli (abbreviated as E. coli) are bacteria found in the environment, foods, and intestines of people and animals. E. coli are a large and diverse group of bacteria. Although most strains of E. coli are harmless, others can make you sick.

Listeriosis is a potentially fatal sickness caused by consuming food infected with the bacteria Listeria monocytogenes. Each year, an estimated 1,600 people contract listeriosis, with approximately 260 dying. Listeria monocytogenes (L. monocytogenes) is a pathogenic (disease-causing) bacterium found in wet habitats, soil, water, decaying vegetation, and animals, and it may survive and even thrive under refrigeration and other food preservation procedures.

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1 year ago

What are the 5 kingdom of animals?Provide 2 example of each kingdom?

Kryger [21]

Answer:

Living organisms are divided into five kingdoms:

Prokaryotae

Protoctista

Fungi

Plantae

Animalia

Prokaryotae

Unicellular and Microscopic.

Non-membrane bound (no nuclear membrane, no ER, no mitochondia).

Cell wall made of murein.

Examples: Bacteria or Cyanobacteria (photosynthesising bacteria).

Protoctista

Mainly small eukaryotic organisms.

Many live in aquatic environments.

This is usually the kingdom where organisms which aren’t animals, plants or fungi go.

Examples: Algae, slime moulds and the malaria causing Plasmodium.

Fungi

Eukaryotic

Multicellular

Cell wall made of chitin.

The members of this kingdom don’t possess photosynthetic pigments and are therefore heterotrophic.

Examples: Mushroom, Mold, Puffball

Plantae

Eukaryotic

Multicellular

Cell wall made of cellulose.

Members of the plantae group contain photosynthetic pigment and gain their energy through it and are therefore autotrophic.

Animalia

Eukaryotic

Multicellular

Heterotropic

The members of this kingdom can be split into two groups, vertebrates and invertebrates. The diagram below shows the different subsections of the animalia

4 0

3 years ago

Which type of solution causes crenation or shrinkage of submerged red blood cells?

Nitella [24]

If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink.

Crenation is a phenomenon which occurs when cells of animal origin are exposed to a hypertonic solution, meaning that the solution which bathes the cells has a high concentration of solutes. In crenation, the cells shrink and their shapes become distorted, often with a ruffled or scalloped edge.

When a red blood cell is placed in a hypertonic solution, it shrinks as water is drawn out of the cell and into the surrounding solution. If the same blood cell placed in a hypotonic solution, the blood cell grows in size. Blood cells in isotonic solutions do not shrink or swell.

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1 year ago