Observing Animals (Image Attached) Let’s study and compare three animals: a frog, an ancient and extinct mammal-like animal, and an owl. Observe the illustrations, and then answer the questions.

1. How are the bodies of the three animals similar to one another? How are they different?

2. What might these similarities suggest about the common ancestor of these organisms?

one centimetre is equal to 0.01 metres

substitution is the answer in this case

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.