Define menarche and menopause

Menarche is the first menstrual cycle, or first menstrual bleeding, in female humans. From both social and medical perspectives, it is often considered the central event of female puberty, as it signals the possibility of fertility.

Girls experience menarche at different ages. Having menarche occur between the ages of 9–16 is considered normal. The timing of menarche is influenced by female biology, as well as genetic and environmental factors, especially nutritional factors.

Menopause, also known as the climacteric, is the time in women's lives when menstrual periods stop permanently, and they are no longer able to bear children.

Menopause usually occurs between the age of 48 and 52. Medical professionals often define menopause as having occurred when a woman has not had any menstrual bleeding for a year. It may also be defined by a decrease in hormone production by the ovaries.

Answer:

Effective food supply was most likely an effect on society that resulted from improvements in blood handling during World War I and World War II.

Explanation: with a great tolerance to a wide range of conditions the species would adapt and thrive which would allow it to reproduce and have all it needs to survive, grow, and take over.

Need this store of protein: 

The seed consists of three components: embryo, endosperm (sometimes perisperm), and seed-coat. Both endosperm and embryo are the products of double fertilization, whereas the seed-coat develops from the maternal, ovular tissues. The seed habit is a significant advancement in the evolution of higher plants.

Anatomy of seed :-

Seed storage proteins provide a source of amino acids and reduced N necessary for germination and early growth of the seedling.

Rank the following cities in order of earthquake risk from high risk to low risk:

A scientist look for in a plant that would identify it as a club moss rather than a liverwort.

D. The population density of beetles will decrease.

when soaked in dilute sodium chloride solution onion gain mass because of the process of osmosis. Explanation: Osmosis is a process when there is movement of water from the region of comparatively higher concentration to the region of lower concentration across in a permeable membrane.

Answer: Tornadoes form when warm, humid air collides with cold, dry air. The denser cold air is pushed over the warm air, usually producing thunderstorms.

99% percentage of errors does our body's "auto-correct",system detect.

Errors associated with protein mismatch and translation is automatically detected by the body system. Once, mismatch occurs, synthesis stops, hence, this error is almost always detected at all times. Therefore, the percentage of errors automatically detected is about 99%.

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