Answer: G. thymosin and thymopoietin
Explanation:
The thymus produces and secretes thymosin, a hormone necessary for T cell development and production. The thymus is special in that, unlike most organs, it is at its largest in children. Once you reach puberty, the thymus starts to slowly shrink and become replaced by fat.
Answer:
Elements are made up of only one type of atom.
Each element has a unique chemical symbol.
Elements can be identified by their atomic number.
Explanation:
Ammonium hydroxide mostly acts as a reactant. Ammonium hydroxide is a colorless solution and exists only in solution form. It has a strong and pungent odor. It reacts with sulfuric acid and also many other strong acids. This reaction is exothermic which releases huge amount of heat or energy.
Ammonia water when in contact with volatile compounds, forms fumes. Ammonium hydroxide dissolves copper and zinc. It produces ammonia and nitroxides when heated to decomposition.
I think that correct answers are:
<span>Some of them lose their leaves in winter. (i.e. <span><em>Larix</em></span>)</span>
<span>They include the tallest plants (i.e<em>.Sequoia)
</em>I don't think they are the oldest type of seed plants, since in the past the classes like progymnosperms and seed ferns existed prior to the gymnosperms. But question isn't absolutely clear to me and I can't be 100% sure.
All of the gymnosperms have seeds unless human grows some seedless variant.
Gymnosperms don't have flowers like angiosperms do, but some people think that cone is kind of flower.
Male cones produce pollen, not female.
Hope I helped :)
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