The atmospheric layer responsible for weather is the
troposphere
stratosphere
mesosphere
thermosphere

The troposphere is the first layer above the surface and contains half of the Earth's atmosphere. Weather occurs in this layer.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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