Answer:
There were smaller proportions of water vapour, ammonia, and methane.
Explanation:
The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. As the Earth cooled down, most of the water vapour condensed and formed the oceans.
Abnormally low levels of the neurotransmitter serotonin are associated with <span>depression. </span><span>When the brain produces low levels of serotonin, such signals become much more irregular and brief, thus, producing psychiatric disease processes including depression.</span>
The effect of regular exercise on heart and lung function is known as cardiorespiratory conditioning. It is the <span>ability to sustain exercise for a long time. It is the enhancement of heart and circulatory function produced by regular strenous aerobic exercise.</span>
Answer:
option A.
Explanation:
The correct answer is option A.
Responsible stage suggests the major concern of middle age related to personal situation.
Executive stage is the stage in middle adulthood where people have broader perspective than earlier people care about the world.
Achieving stage is stage of young adults where intelligence is applied to achieve long term goal like career.
Acquisitive stage is a first stage of development which includes all the childhood and adolescence.
Answer: Parathyroid hormone(PTH)
Explanation:
The parathyroid hormone are also known as parathyrin and the parathormone which regulated serum calcium by its effect on the kidney and the bones. The main function of this hormone that it monitor the level of calcium in blood and when the level of calcium in the blood goes low then, the parathyroid gland generated more amount of parathyroid hormones.