Answer:
The correct answer would be d. thymus.
The thymus is a specialized lymphoid organ of an immune system.
It serves as the site for training and maturation of T-lymphocytes or T cells.
It is composed two identical lobes each containing outer region termed as cortex and inner region termed as medulla.
T-cells are first trained and selected in the cortex region via positive selection. In this, T cells which are able to bind to foreign antigens are selected and rest are degraded.
The selected T cells then move in the medulla region where they are selected by negative selection. In this, the T cells which binds to self-antigens are degraded and rest survive to become functional T cells.
Answer:
the end or close; final part. the last main division of a discourse, usually containing a summing up of the points and a statement of opinion or decisions reached. ... final decision: The judge has reached his conclusion. a reasoned deduction or inference.
<span>mendel's was sucessful geneticist coz of the following reasons
1) he worked on pisum sativum which is bisexual
2) short duration of life cylce
3)its an annual plant
4)he was also having good knowleged of statics</span>
Explanation:
ATP is a nucleotide consisting of an adenine base attached to a ribose sugar, which is attached to three phosphate groups. ... When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis
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There are no bumps on the er the er is the the emergency room
