Answer: a. an anticodon and an amino acid
Explanation:
The following is a typical structure The tRNA where we can observe an anticodon that binds to the nucleotide sequence of the mRNA and an amino acid that in triplet encodes for an protein.
Sediment pollution is the single most common source of pollution in U.S. waters. Approximately 30% is caused by natural erosion, and the remaining 70% is caused by human activity. ... Sediment pollution can have long-term impacts on aquatic insects, fish and other wildlife in affected waterways
Answer:
C
Explanation:
Photosynthesis the process where a plant makes energy to store it and use it and keep aking more to keep itself alive. C is the only one the says photosynthesis and has the right organs and products in the right spaces. The plants leaves are what make the energy. They need the sun (energy source) to make the sugars (energy product) that they need to survive.
<span>They do not have a phloem or xylem.</span>
During T cell maturation, the t cells must pass two tests. first, immature t cells that can recognize MHC molecules are Selection. Second, immature t cells that recognize and bind to molecules normally found in the body are Activation.
Selection is the first test that T cells must pass. During this process, immature T cells that can recognize MHC molecules are selected. MHC molecules are found on the surface of cells and are involved in antigen presentation. When T cells come into contact with MHC molecules, they are able to recognize the molecules and begin the process of selection. During selection, the T cells that recognize MHC molecules are chosen over those that do not. This helps ensure that the cells that are selected are those that can properly respond to antigens.
The second test that T cells must pass is activation. During activation, T cells that recognize and bind to molecules normally found in the body are selected. These molecules are called self-antigens and can include proteins, carbohydrates, and lipids. When T cells come into contact with self-antigens, they are able to recognize the molecules and begin the process of activation. During activation, the T cells that recognize self-antigens are chosen over those that do not. This helps ensure that the cells that are selected are those that will not attack the body’s own cells.
Learn more about self-antigens at : brainly.com/question/24468411
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