Answer:
its a thousand of generation evolution i think as of darwins law of evolution
Answer:
There is 50 chance because there are two chromosomes that are same and two which are difeerent . XX MEANs girl XY means boys .
Involuntary, meaning things in the body such as your heart is all regulated to act unconsciously while also receiving directives from the brain.
There are different ways to treat the problem. You can apply heat to infected area, elevate your leg, use an over the counter anti-infammation drug, and possibly wear a compression stocking.
A short period of time, after the onset of puberty. The first mature eggs starts to be released from the ovaries during menstruation. Menstruation may first occur during the start of puberty in women, it may start as early as 8 years old and can start late as 16 years old. Menstruation is the process wherein not fertilized eggs are being broken down and released from the body.