Which of the following best describes an example of a specific internal response to harmful bacteria?
Skin serves as a physical barrier that prevents bacteria from entering the body.
Saliva contains enzymes that destroy bacteria and prevent infection.
Bacterial infection causes the release of histamine, which leads to inflammation and swelling.
Antigens trigger the production of antibodies, which mark bacteria for destruction.
Answer:
Antigens trigger the production of antibodies, which mark bacteria for destruction.
Explanation:
The question is talking about internal response to bacteria so we have to look at what happens inside the body pertaining to bacterial infection, so the answer is "Antigens trigger the production of antibodies, which mark bacteria for destruction".
Answer:
A .....the skin is the bodies first line of defense
Explanation:
The first line of defence is non-specific and aims to stop microbes from entering the body.
uranium
coal
oil
gas
A)chemical property
B)physical property
C)chemical change
D)physical change
The color is one among the B) physical properties.
The physical properties are visible or observable. The physical properties are measured with physical system. There are many physical properties which include color, size, radiance, luster, and so on. There are two types of physical quantities which includes intensive property and extensive property. This property depends on the change in the structure of the material.
The color of the substance depends on the color it is observing and illuminating which depends on the reflective property of the substance.
The color of ink is basically a physical property. The correct option is B.
Ink's colour is a tangiblecharacteristic. A substance's physical attributes are traits that may be seen or quantified without affecting its chemical makeup. Ink's appearance is referred to as its colour, which is determined by how it responds to light.
There are no chemicalreactions taking place, and the ink's chemical makeup does not change because it is an inherent quality of the ink itself.
Colour, smell, density, melting point, boiling temperature, and other qualities are examples of physicalproperties.
In the case of ink, the colour is a physical characteristic that aids in differentiating and identifying various types or ink formulations.
Thus, the correct option is B.
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