Which headings best complete the chart , the chart is in the picture below.

The right answer is the third one

A point mutation is a change in the structure of the gene, affecting one to several nucleotides (between one and ten).

There are four types of point mutations:

* substitution: which is the replacement of one (or more) nucleotides.

* insertion : which is the addition of one or more nucleotides;

* deletion : which is the loss of one or more nucleotides.

* inversion: which is the permutation of 2 neighboring deoxyribonucleotides;

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

not too sure but maybe in the hot springs.