Answer – Chromosome
In eukaryotic nuclei, DNA and proteins are packaged into organized cellular structures known as Chromosomes. Genetic material is housed in the nucleus where is it tightly packed into linear chromosomes. Chromosomes consist of a complex of DNA and protein which is known as chromatin. Chromatins are organized into subunits called nucleosomes
Answer: it is working out by doing exercises that quickly accelerate your heart rate
Explanation:
A good example is running on a treadmill or jump and jacks
