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Basile [38]
3 years ago
11

When the body is invaded by antigens, the immune system forms substances called?

Biology
1 answer:
Fantom [35]3 years ago
4 0
<span>Antibodies. A. k.a. immunoglobulins. They are produced by a group of white blood cells called B lymphocytes (or B cells). There are 5 classes of immunoglobulins; IgM,IgA,IgE,IgG and IgD.The classes of antibody diifferent both in their constant region and in their activity.IgG, the most common antibody, and is found mostly in the blood and tissue fluids, and IgA is localized in the mucous membranes which line the respiratory and gastrointestinal tracts.</span>
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3 years ago
Enchanted Rock State Natural Area is located in Central Texas. Enchanted Rock is a dome of granite. The area contains four easil
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Answer:

D) Granite rock

Explanation:

Enchanted Rock is a dome of granite, so you would pick this answer choice.

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8 0
3 years ago
Sister chromatids present during mitosis are
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Answer:

The correct answer is e. All of the above.

Explanation:

Sister chromatids are made during the synthesis phase of the cell cycle. In the synthesis phase, the homologous chromosomes get replicated and sister chromatids are produced so they are produced by duplication of chromosomes.  

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Therefore the right answer is e.

4 0
3 years ago
An estuary is ___
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Answer:

<em>The correct option is d)  an ecotone</em>

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An ecotone can be described as an area of transition between two different biomes. An estuary can be described as an ecotone where the river water meets the seawater. The freshwater biome mixes with the seawater biome in an estuary. Unique plants and animals are grown in an estuary which are adapted to live in such an environment. The water present in an estuary is termed as brackish water. Hence, the correct option is d.

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3 years ago
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The table below describes two parts of a cell.
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