State two additional kinds of evidence beside structural and molecular that can further support the relationship between species

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.

Using meiosis, the sporophyte produces spores that are .

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?