Answer: The correct answer would be the fourth option.
Explanation:
Water is a chemical compound formed from oxygen and hydrogen. Its chemical formula is H₂O. It is polar inorganic compound. It is essential for life as life would not be possible without water. It helps in stabilizing the global temperature as well as body temperature of living organisms.
However, it is not the most abundant molecule in the atmosphere. The nitrogen is the most abundant gas present in the atmosphere which nearly makes 78 percent of the atmosphere. The water vapours hardly makes 1 percent of the atmosphere.
Answer:
Body temperature control in humans
Explanation:
Body temperature control in humans is one of the most familiar examples of homeostasis. Normal body temperature hovers around 37 °C (98.6 °F), but a number of factors can affect this value, including exposure to the elements, hormones, metabolic rate, and disease, leading to excessively high or low body temperatures.
Answer:
Plasma estrogen levels reach their peak at the end of the luteal phase of the ovarian cycle.
a. True
Explanation:
A woman's estrogen levels become highest towards the end of her ovulation. At this point, the woman is naturally prepared for a possible pregnancy. The occurrence of the highest estrogen levels coincides with the luteal phase, a stage of a woman's menstrual cycle, which occurs after ovulation (or the release of eggs from the ovaries), and before the start of the normal period. This luteal phase has been observed to be within 14 days for all women. By the end of the luteal phase, the corpus luteum function declines.
Calcium has twenty neutrons.
Answer:
False
Explanation:
Phospholipids make up the basic structure of a cell membrane. ... This arrangement of phospholipid molecules makes up the lipid bilayer. The phospholipids of a cell membrane are arranged in a double layer called the lipid bilayer. The hydrophilic phosphate heads are always arranged so that they are near water.
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