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Answer::: Brain structures called the hypothalamus and pituitary gland control the menstrual cycle. The hypothalamus triggers the pituitary gland to make hormones that trigger the ovaries to make oestrogen and progesterone. ... Disorders of the hypothalamus, pituitary gland or ovaries can affect menstruation, causing amenorrhoea
The sun rays that hit the equator are hotter because the equator is pointed more to the sun
Rays that strike the poles arent that effective because of the earths tilt, and it's rotating and revolving constantly
All of them!
Composite subatomic particles (such as protons or atomic nuclei) are bound states of two or more elementary particles. For example, a proton<span> is made of two up </span>quarks<span> and one down quark, while the atomic nucleus of </span>helium-4<span> is composed of two protons and two </span><span>neutrons</span>
The right choice of them is biosphere, community, and organism.