Because it’s the way a plant provides itself with food
I'm pretty sure it's tissue, but i'm not sure
Epstein-Barr virus (EBV) is an important human pathogen that establishes a lifelong persistent infection and for which no precise animal model exists.Agents representing EBV and sets of B and T lymphocytes move and interact on a three-dimensional grid approximating Waldeyer’s ring, together with abstract compartments for lymph and blood.
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D) A thing or event that causes a reaction.
Explanation:
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Image result for Two differences between primary and secondary metabolites
Primary metabolites are not species-specific and thus might be identical in some organisms. Secondary metabolites are species-specific and thus are different in different organisms. Primary metabolites are involved in the growth, development, and reproduction of organisms.Aug 18, 2020