yes, cell organelles can be seen with a microscope
Trypanosoma and Plasmodium have members that can evade the human immune system by frequently changing their surface proteins
Antigenic variation in P. falciparum is driven by PfEMP1/var. The other gene families' members, rif, stevor, and surfin, which encode the proteins RIFINS, STEVOR, and SURFIN, respectively, go through clonal variation, which makes them useful in evading the host immune response.
By frequently changing the thick layer of variable surface glycoprotein (VSG) on the cell surface, Trypanosoma brucei parasites successfully escape the host immune system. The monoallelic expression of VSGs is strictly regulated in each parasite. On the trypomastigotes, the VSG proteins (60 kDa) produce a surface coating that is 12–15 nm thick. Through significant antigenic diversity, the VSGs allow the trypomastigotes to sidestep the immune system of the mammalian host.
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Answer:
B) Oxygen is needed for cell processes and carbon dioxide is a waste product
Explanation:
Cellular respiration refers to the cellular mechanism by which organisms combine molecular oxygen (O2) with organic compounds obtained from foods, it is a chemical reaction that releases 1-energy (ATP), which is used by cells to carry out its functions, 2-carbon dioxide (CO2) and 3-water (H2O). During the gas exchange, O2 is first transported from the lungs to the blood cells, which subsequently deliver nutrients and O2 to all cells of the body. Simultaneously, CO2 diffuses from cells to tissue capillaries, and then this waste product passes from the bloodstream to the lungs where is eliminated.
Social science because it means social studies
It is dependent on the availability of nutrients. Hope this helped:)