If we all had the same DNA that would mean we would all be the same, no differences <span />
These are known as Hormones. Hormones are chemical messengers that are released in one tissue normally endocrine glands for example, adrenal glands, pituitary glands, and transported in the blood stream to alter the activities of specific cells in other tissues. Hormones serves as messengers, controlling and coordinating activities or processes such as growth, metabolism and fertility in the body.
The example of a nonpoint source of freshwater is the first option: <span>pesticide runoff from farm fields. This is one of the most common nonpoint source of poullution</span>
They are not from the periodic elements scientifically.
Answer:
They have genetic material.
Explanation:
All three domains and viruses have genetic material. They have to, otherwise they couldn't reproduce, whether sexual or asexual. In viruses, it can be RNA or DNA; obviously in eukarya it tends to be DNA, remembering that humans are eukaryotes; and in the other two domains a similar pattern is followed.
Why not the other options?
They are composed of cells
- Viruses technically don't have "cells," and even to say cells plural can be a misnomer for some of the more simple forms of life that are unicellular.
They are living things.
- All three domains are alive (bacteria, archaea, eukarya) but viruses are technically not considered to be alive.
They have organelles.
- Eukarya and prokarya technically both have organelles (think of prokaryotic ribosomes), but not all groups that you mentioned have organelles. Remember that organelles ("little organs") are specific groups of cells performing a function, and they usually have names.
