Which of the following does NOT distinguish a prokaryotic cell from a eukaryotic cell?

A. The ability to undergo meiosis
B. The presence of ribosomes
C. A simple and primitive structure
D. DNA in a circular structure

The answer is DNA in a circular structures

this protocol describes a detailed procedure for intracellular flow cytometry staining.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.