Atom
Molecule
Organelle
Cell
Tissue
Organ
Organ system
Organism
It is bright-field...............
It is a form of natural selection called sexual selection.
Answer:
A chromosome is an organized package of DNA found in the nucleus of the cell. Humans have 23 pairs of chromosomes--22 pairs of numbered chromosomes, called autosomes, and one pair of sex chromosomes, X and Y.
Explanation:
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