Chromosome is a packaged structure of DNA observed in the cell nucleus during metaphase stage of cell division when aligned in the equatorial plate of the cell.
Chromosomes number varies in different species which facilitates replication and distribution of the DNA to new daughter cells during cell division.
Chromosome is formed after coiling of DNA many times around proteins called histones which provides the structural support to DNA and form a special structure nucleosomes, further coil up and create chromatin loops which further coil around each other and make a full chromosome.
Plants need water, so that their guard cells can fill up and become turgid which would allow the stomata to open and gas to exchange. If there is not much water, not much gas exchange can occur hence not much Carbon dioxide can be taken in.
Adapting is when the organism slowly changes as each generation goes by because the organism more suited for the environment is going to survive and reproduce while others will have a harder time and more than likely die off.
