Which of the following processes is anaerobic? glycolysis
the electron transport chain
the citric acid cycle
photosynthesis

glycolysis is an anaerobic process.

Explanation:

glycolysis is the first step on cellular respiration, it doesn't need supply of oxygen , and it is carried out in cytoplasm of the cell.

during glycolysis glucose break down to form pyruvate or pyruvic acid which further get converted into energy .

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.