It is believed that this happens because some signals that regulate development are the same between different species and because <span>they share ancient genes. </span>These ancient genes are expressed during a middle "phylotypic stage" of embryonic development for all species.
For example, human and animal embryos go through very similar stages of early development and share similar features such as tails and gill-like structures. The major difference appears to be how long it takes to reach each of these same stages.
I know this sounds silly but I just took the test they were made in the stars or B
Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules.
The answer is A. Animals.
First of all humans and insects belong to the group of animals. There are about 1.6 million known species of animals which include many more groups. At least 1 million of animal species are insects. Humans belong to the one only species Homo sapiens of Hominina clade. Talking <span>about </span>plants, there are about 300.000 species, leaving animals as the right answer.
