Aculture of living cells includes a solution called a a) concentration b) flask c) medium d) slide

 C) medium

Explanation:

A culture of living cells is grown over a solution that is called as a growth medium. A growth or culture medium can be in the form of solid, semi-solid or liquid. It is typically designed to facilitate the growth of the living cells of plants, animals, humans and microbes. The ingredients in the growth medium may vary with the type of living cells to be grown.

"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."

answer: b

coz red blood cells marrow and circulates the body for 120 days.