High CO2 levels cause plants to thicken their leave ,which could worsen climate change effect researchers says.
plant scientists observed that when CO2 levels increase in the atmosphere <em><u>most </u></em><em><u>plants</u></em><em><u> </u></em><em><u>do </u></em><em><u>unusual </u></em><em><u>,</u></em><em><u> they</u></em><em><u> </u></em><em><u>thicker </u></em><em><u>their</u></em><em><u> leave</u></em>
<em><u>germination</u></em><em><u> </u></em><em><u>increase</u></em><em><u> in</u></em><em><u> </u></em><em><u>high</u></em><em><u> </u></em><em><u>temperature</u></em><em><u> </u></em><em><u>up </u></em><em><u>to</u></em><em><u> the</u></em><em><u> </u></em><em><u>point</u></em>
<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.
</span>
cd4+ T helper (Th) cells include Th1, Th2, and Th17 cells. They contribute to aliergic reactions and fighting extracellular parasites.
Http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0072434/
There is a website with some info. Hope it helps! :)
Tissues arranged together make up organs, which, when functioning together in groups, make up organ systems. This statement refers to the levels of the organization of life in organisms. Tissues came originally from cells, which are the building blocks of life and is the main composition of all living organisms. Both plants and animals have tissues that serve different functions to maintain homeostasis within its respective bodies. Organ systems are developed when organs work together in perfect balance to perform multiple chemical and physical processes within the body. If one organ does not function well it may affect how the other function as well.