Allergic responses to inhaled antigens occur when an individual is first sensitized to the antigen (i.e., the allergen), inducing an immune response and then has a subsequent exposure to the same antigen. The sensitization phase is characterized by <u>Induction of a CD4 T cell type II immune response</u>.
The process by which your body becomes sensitive to a particular substance is called sensitization. When your immune system becomes sensitized to an allergen, you can develop certain symptoms.
Antigens that can induce an allergic response are called allergens, and they are often derived from non-infectious or non-microbial sources.
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<span>The footprints of a dinosaur are an example of what type of fossil?
D. Trace Fossil
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<span>Characteristics that mentioned biomes have in common are:
- They are all forests, dominated by trees and other woody vegetation.
- They inhabit animal life with great microbial diversity.
- They all have big carbon sinks.
Still, trees different in a number of ways in these three biomes:
- </span><span>Tropical rainforest: Trees are evergreen and have large green leaves. Canopy is multilayered and dense, so there is a little light in the forests.
- </span><span>Temperate deciduous forest: Trees are deciduous, leaves are lost annually. Canopy is moderately dense, so there is more light than in tropical rainforests.
- </span><span>Boreal forest: Trees are evergreen conifers with needle-like leaves. Canopy is thick and permits low light penetration.</span>
<span>The two scientists, who are credited with creating the first accurate model of DNA are JAMES WATSON and FRANCIS CRICK. The success that these two scientists achieved concerning DNA structure is based on the works of other scientists, who have carried out series of research on DNA. The real proof of Watson - Crick model for DNA was released in 1982, this was after the B form of DNA was crystallized and its X ray pattern was solved.</span>
Answer:
The <u>air quality index</u> is a measure of ozone and other pollutants in the air.
Explanation:
