Find the sample variance of the following set of data: Round to one decimal.  show work on paper. 2, 5, 7, 9

Which of the following is a natural number? Select all correct answers.  You do not have to show work on your paper.

Diploid cells that undergo meiosis, giving rise to sperm: 

In the ovarian/uterine cycle, estrogen is directly responsible for the 

Low pressure, porous vessels that reabsorb solutes and water from the tubule cells. 

The soft mucosal lining of the uterus is the endometrium.

Plays a role in urine concentration: 

The corpus luteum prevents loss of the implanted embryo through menstruation by secreting ______. 

Reabsorption of nutrients like glucose and amino acids takes place in the proximal convoluted tubule via cotransporters that utilize secondary active transport.  Which of the following would stop the reabsorption of glucose at the apical surface of the cells in the PCT? 

The embryonic period lasts until the end of the eighth week.