Why is it important to know about poisonous plants?​

We all know that they are good for us because they provide us food, wood, and the precious oxygen. But, there are many species of plants that also carry poisons. These poisons may cause itching, vomiting, diarrhea, and even death. The poisonous plants play an important role in nature.

Explanation:

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option a and d is the correct answer

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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.