Two trophic levels
Typically there are three or four trophic levels in a community because after this point, it becomes very hard to sustain organisms. The amount of energy lost at each trophic level makes it harder and harder to sustain life.
Answer is B: false
it's too high in protein and too low in iron
Answer:
Green building is a modern concept in architecture by means of which it is aimed at construction developments that are not invasive with the environment, or that affect the ecosystem in which they are built as little as possible, with the aim of leaving future generations an intact environment worth living in.
Thus, for a construction to conform to this concept, it must follow the following parameters:
-The construction must adapt to the natural environment, and not this to the construction.
-It has to be resource-efficient. Furthermore, the materials used must not be exploited indiscriminately or causing damage to the environment.
-The external area of the building must respect the natural patterns of the area where it is built, favoring a harmonic view between the building and the surroundings.
-Use of clean and renewable energy to supply the building.
Earth's magnetic field protects <span>the </span>planet<span> from solar radiation.</span>
<span>Cytotoxic t-cell subpopulations are specialized to combat intracellular pathogens, whereas helper t-cell subpopulations are specialized to combat extracellular pathogens.
</span>Cytotoxic t-cell are CD8+ cells. Cytotoxic t-cell uses granzymes to <span>kill </span><span>intracellular bacteria, that lives in the cytosol such as viruses. They identify the pathogen forgein peptids that are bounded to MHC-I on the cell surface.
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cd4+ T helper (Th) cells include Th1, Th2, and Th17 cells. They contribute to aliergic reactions and fighting extracellular parasites.
