Brain
Lunges
Stomach
Liver
Answer:
Class Aves
Explanation:
Class Aves consist of birds. Birds have feathers and lightweight bones to help them fly.
Answer AND Explanation:
By examining fossils, biologists have been able to recreate the evolutionary history of the various organisms that have inhabited the earth. From fossil evidence, scientists have found that the first organisms evolved in the sea at about 3.6 billion years ago. These are unicellular organisms that resembled present day bacteria and blue-green algae.
A subset of MHC molecules known as Class II of the Major Histocompatibility Complex (MHC) is often only found on specific antigen-presenting cells such as dendritic cells, mononuclear phagocytes, specific endothelium cells, thymic epithelial cells, and B cells.
<h3>Do macrophages contain MHC 2?</h3>
In order to deliver Listeria monocytogenes to T cells for phagocytic processing, class II MHC molecules are found in macrophage lysosomes and phagolysosomes.
<h3>Are macrophages MHC-positive?</h3>
Exogenous antigens can be processed by macrophages and displayed on MHC molecules.
<h3>Which cells possess MHC 1 vs. 2?</h3>
All nucleated cells contain MHC I glycoproteins. Specialized antigen-presenting cells are the only ones to contain lls.
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