Without the positive selection process in lymphocyte maturation without the positive selection process in lymphocyte maturation autoimmune diseases would be likely to result t-cells would not be able to properly bind to apc's and therefore not be activated by them nk cells would be non-functional monocytes would not be able to migrate into infected tissue and differentiate into macrophages

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.