In what year was on the origin of species published? a. 1831 b. 1837 c. 1846 d. 1859

The correct answer is-  D) 1859.

The book named "On the Origin of Species" ( more precisely On the Origin of Species by means of Natural selection) was published on 24th of November, 1859.

It was published by a British naturalist, Charles Darwin. The book contains evidences of how different life forms have evolved and focuses on an evolutionary theory that is called natural selection.

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

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."