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Which of the following statements about how B and T cells recognize antigen are true? a. B cells only recognize antigen presented by class I or class II MHC molecules. b. Both cell types can recognize antigen in solution (without cells). c. Both cell types recognize extracellular matrix-bound antigens.
The bacteria that cause dental cavities in humans break down sugars, releasing what chemical which causes tooth destruction? a) Acids b) Bases c) Enzymes d) Monosaccha
What is NADP and NADPH? NADP is the abbreviation of the nicotinamide adenine dinucleotide phosphate cation, a hydrogen acceptor. NADPH is made when NADP binds to one hydrogen a
Q. What are the cells that form the cartilaginous tissue? The main cells of the cartilages are the chondrocytes originated from the chondroblasts that secrete the intersticial
What is the phellogen? What its function? The Phellogen also called as cork cambium is the meristematic plant tissue responsible for the formation of the periderm (the covering
What are the typical vegetation and the typical fauna of the temperate forests? In the temperate forest deciduous trees predominate. Mammals are originated in great number, as
Which of the following does NOT contain a guanidinium group Select one: a. Urea b. arginine c. creatine d. guanidinium ion
How do populations of predators and prey vary in predatism? Whenever a predator population enhances at the first moment the prey population tends to decrease. At a second momen
Bacteria called extremophiles are able to grow in hot springs such as Old Faithful at Yellowstone National Park in Wyoming. Do you think that the DNA of extremophiles would have a
Explain the Work of John Ray in Animal Taxonomy? The first important work on both animal and plants was initiated by John Ray (1627-1705). He followed Aristotle and divided ani
what is its description and 3 most common example
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