It takes about 30 doubling times for a cancer cell to form a tumour that is large enough to be felt through the skin with hands. Calculate how many months it would take for the cells in Figure 1.36 to form a tumour that could be felt if the double rate is two months.

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

What is the importantence of the carbon and nitretan cycles in the environment

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.