Which statement describes how the Van Allen belts are formed? when low-energy particles from the Sun bounce off Earth’s magnetic field
when high-energy particles from the Sun bounce off Earth’s magnetic field
when low-energy particles from the Sun are trapped by Earth’s magnetic field
when high-energy particles from the Sun are trapped by Earth’s magnetic field

bc blah

explanation:

bc blah

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.

the answer is c.mitochondria. glad to .