Is peter receiving enough dietary iron? assume that he eats the entire portions?

A balanced diet should cover the needs. Iron is mainly present in meat.

Iron needs vary according to sex, age, and physiological status. The recommended dietary intakes are 9 mg per day for men and women breastfeeding and menopausal, 16 mg for women and 25 mg for pregnant women.

Peter had 10.8mg of iron, so yes it is enough for his needs.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.