Which type of organism first appeared during the mesozoic era?
primates
cyanobacteria
marsupial mammals
jawless fish
during which time period would the platypus have evolved?
mesozoic era
cambrian explosion
quaternary period
tertiary period

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

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.