Pls help if you can! Based on what we just learned about sonar systems used on naval vessels, what would be the biological equivalent to this in animals. (Hint: Think about animals that are nocturnal or live underwater.)

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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.

b is dominant over the allele for the white fur.