Nerodia sipedon insularum is a species of the northern water snake that lives on islands in the western part of lake erie. this snake exhibits polymorphism and can be described as banded.

Yes

Explanation: This specie of snake exhibits polymorphism, meaning they exists in different colors from brown to black, gray, reddish brown and other colors. Their polymorphism can exist in banded, intermediate, or un-banded form depending on the migration pressure.

Interestingly this specie of snakes are nonvenomous and harmless to humans

because the light is a great source of energy for the plants to survive. (i hope this )

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.