A chemical bond to form in a chemical compound must be formed by two or more atoms attracted to one another.
Answer:
Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size. The other two chromosomes, X and Y, are the sex chromosomes. This picture of the human chromosomes lined up in pairs is called a karyotype.
Explanation:
Emperor penguins leave and stay for winter months.
<span>Euglena is eukaryotic, because they have organelles and a nucleus. </span>
