Natural selection merged with the work of in the 20th century to open up our understanding of evolutionary theory. a. Alfred Russel Wallace b. Gregor Mendel c. Jean-Baptiste Lamarck d. Erasmus Darwin e. Charles Lyell

The correct answer is B) Gregor Mendel.

Explanation:

Gregor Johann Mendel was an 18th-century Genetic Scientist whose works, although revolutionary, didn't come to scientific limelight until the 20th century.

He was famous for his experiment with the Pea Plant. Through his experiments, he brought to record many of the rules of heredity also called the laws Mendelian inheritance.

Mendel died in 1884 aged 61, however, his work serves as the foundation for modern-day genetic science.

Cheers!

"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."