4. Which of the following are extra senses that vertebrates may have? (Choose all that apply) magnetoreception
proprioception
baroception
o nociception

all of them apply to some vertebrates

magnetoreception

proprioception

baroception

nociception

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.