evaluate which metal is better to use in sporting equipment and medical implants: titanium-specific gravity= 4.5, contains only Ti; or steel-specific gravity= 7.7,contains Fe, O, Cr

answer; a male inherits only one allele of the x-linked gene controlling hair color;

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

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 : )