Answer:
B
Explanation:
Radiometric dating uses naturally occurring radioactive elements such as carbon-14 within the rock or fossil to estimate its approximate age. The half-life of the element must also be known. The amount of the radioactive trace element is compared to, in a ratio, with that of the number of the decay product elements. This approximate age can then be relatively compared to those of other rocks or fossils.
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Answer: it means you do things purposely to get a reaction that will hopefully help to prove your hypothesis correct or to show what works in the experiment and what does not
Explanation:
The thymus gland is actually composed of lymphoid tissue and is located in the mediastinal cavity, in front of and above the heart.
<span>The thymus gland is a two-lobe primary lymphoid organ which has an important role in immune function. It secretes thymosin hormone which stimulates the maturation of T cells. So, the thymus is a place where T cells mature. This organ is most active during<span> the neonatal and pre-adolescent periods.</span></span>
