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
It weakens the immune system making it unable to defend itself against viruses and it also attacks the immune system..
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They construct dams and create an ecosystem for other species . Because of their dam building nests become available for birds, fish population increases and waterfowl population goes up
Answer: the steel wool in the 3.0 M HCl reacts fastest.
Explanation: