Which of the following statements is correct? Group of answer choices There are birds and snakes on Antarctica, though snakes have been more successful because they have lower energetic requirements therefore can survive better in the long winter with limited food. There are snakes in Antarctica but no birds, because snakes have a greater dispersal ability and were able to reach that continent. There are birds on Antarctica but no snakes, largely because snakes are ectotherms and can’t survive at the low temperatures found there.

The last option is correct.

Explanation:

Among the given options for the birds and snakes living in Antarctica, the last option is the correct one. There are birds in Antarctica, including penguins which are classified as a species of birds but there are no snakes living in Antarctica mainly because of the environmental conditions that are present are not fit for snakes to survive. They require either soil, trees or water to live and feed, they can not live on ice and snow.

I hope this answer helps.

the eggs of the insects should be the first thing collected at the scene.

false

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.