Answer: It is necessary for the immune system to clearly distinguish foreign cells and proteins from those made by the body so that the immune system will be able to fight foreign cells and proteins and eliminate them from the body.
Explanation: The ability of the immune system to clearly distinguish foreign cells and proteins from those made by the body helps the body to identify pathogens that invade the body and trigger appropriate immune response to eliminate the foreign cells and proteins.
When the immune system of the body fails to distinguish foreign cells and proteins from those made by the body, the body launches an attack against its cells, that is the immune system triggers an autoimmune response in which attacks are launched against the cells of the body and destroy them. This condition in which the immune system recognizes the cells of the body as non-self and launches an attack against them is known as autoimmunity. Autoimmunity is the major cause of most degenerative diseases such as type I diabetes mellitus.
The three adaptations that angiosperms have is attractive aspects of flowers, such as aroma and colors, are artifices created by angiosperms.
<h3>What are the adaptations of angiosperms?</h3>
There are also fruits with adaptations that allow them to be dispersed by the wind; others that have structures that make them able to float on water, being carried by currents over long distances; or that allow them to stick to the fur of animals and be moved to new regions.
In this case, baspects of flowers, such as aroma and colors, are artifices created by angiosperms to attract pollinating animals, such as bats, bees, birds, etc. These adaptations are a major survival advantage over other plant groups.
See more about angiosperms at brainly.com/question/9416370
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The answer is the anther because an ovule and an ovary are female reproduction parts and a pollen grain does not produce sperm nor is it hard.
Answer:
D) It held DNA
Explanation:
The nucleus controls and regulates the activities in a cell. It carries the genes or structures that contain the hereditary information. (DNA)
