Final answer:
Chromosomes in eukaryotic cells are composed of DNA and protein. Each species has a specific number of chromosomes, and in humans, it is 46 chromosomes.
Step-by-step explanation:
In eukaryotic cells, chromosomes are composed of DNA and protein. Chromosomes are structures within the nucleus that contain the genetic material of an organism. They are made up of long strands of DNA molecules that are tightly coiled around proteins called histones. Each eukaryotic species has a specific number of chromosomes, and in humans, it is 46 chromosomes.