Answer:
Tryptophan is an essential amino acid.
Answer:
The Sun radiates huge amounts of energy. Only a small portion of that energy hits the Earth, but it is enough to light our days, heat our air and land, and create weather systems over the oceans. Most of the energy you will learn about comes from the Sun. The Earth also gives off energy.
Explanation:
I am not sure what you are asking, but TT likely refers to the pure tall peas Mendel worked with.
