Chromosome is a threadlike structure present in nucleus .Chromosomes are composed of chromatin and carry the genes in a linear sequence; these determine the individual characteristics of an organism there are 23 pairs of chromosomes out of those one is different. In female it is XXY qnd in males it is xy
Enzymes are substances necessary for the synthesis of most materials in an organism
nucleus is the structure responsible.
Answer:
False
Change over time usually occurs through natural selection. If you are talking about change in time of species.