In a heliocentric system, earth revolves around the sun.
Answer:
True
Explanation:
There are two type of hormones:
- Steroids, which are synthesized by chemichally modifying cholesterol
- Peptidic hormones, which are proteins, and as such, are made with aminoacids.
Keratin is responsible for skin color. The more the melanin in the skin, the darker the skin color of the person. Collagen and keratin makes up nails and hairs. Elastin is a connective tissue that connects the epidermis and the dermis. The dermal papillae nourishes the root hairs.
Answer:
IN OLDEN TIMES:
A girl, when she reaches puberty is barred from entering the prayer room or performing any religious prayers during her menstruation. The only reason mentioned in our scriptures is that she is (ashudha) unclean during that period.
During ancient days, women would take bath in the river, pond or near the well. During the time when the girl would be menstruating, it would be awkward to bathe outside in the river as it would probably ‘pollute’ the water.
So, the ladies did not take bath. Since the ladies did not take bath, they were naturally termed ‘unclean’ during that time. Hence, their being barred from the clean’ places in the house, namely the prayer room or the kitchen.
However, Science has a different meaning for the menstruation. As per science, a woman is more irritable during those days because of a hormonal imbalance. Psychics claim that there is a different aura around a menstruating woman, maybe again a chemical reaction.
Segregating to pray requires a positive attitude and people tend to respond to the negative virations of a person standing with you; maybe that was the reason why a woman was barred from public places and the kitchen.
TODAY:
Times have changed,
It is the old saying of old people. But of a girl cooks during periods then it is not to become bad in taste or it won't get spoiled. The taste of food is going to be same as she cooks on other days. So I think this saying is wrong and girls can cook during their mensuratl days. It is a natural cycle and they r not responsible for it
Answer:
A natural selection
D Plate techtonics
Explanation:
Movement of the plates over Earth’s surface is termed plate tectonics. Plates move at a rate of a few centimeters a year, about the same rate fingernails grow.
The idea that organisms can evolve by micro and macro evolution is a fact. However there is no definite factor to what produces evolution.
Natural Selection is a theory because it is backed by observable evidence but is not considered the definite cause as to why organisms can evolve due to surrounding debate
