Human blood may contain either or both of two antigens, a and b. blood that contains only the a antigen is called type a, blood that contains only the b antigen is called type b, blood that contains both antigens is called type ab, and blood that contains neither antigen is called type o. at a certain blood bank, 28% of the blood donors have type a blood, 15% have type b, and 10% have type ab. round the answers to two decimal places.

the speed increase from w to x due to increased gravity force

the speed decreases from x to y due to decrease in gravity

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.