The backlit screens of computers emit enough light to suppress the hormone melatonin. This hormone rises in the evening and orchestrates daily rhythms.
<h3>What is melatonin?</h3>
Melatonin is a hormone whose secretion in the brain is connected to sleep (i.e. the time of day or circadian cycle).
Melatonin is produced by the pineal gland as an environmental response to darkness.
This hormone (melatonin) is well known to be involved in different sleep disorders, thereby having therapeutic applications.
Learn more about melatonin here:
brainly.com/question/5557798
Answer:
Neurons communicate with each other by sending chemicals, called neurotransmitters, across a tiny space, called a synapse, between the axons and dendrites of adjacent neurons.
Explanation:
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Answer:
The correct answer is - palisade cells that are type leaf cells.
Explanation:
The outer layer of cells does not contain chloroplast that is a protective layer called the epidermis. The palisade layer is immediate to the top layer of the leaf that contains most of the chloroplast in comparison to the other parts of the roots or leaf cells.
Chloroplast contains chlorophyll that collects sunlight in order to initiate photosynthesis. There are different types of chlorophyll types present in the cell of the plant.
Thus, the correct answer is - palisade cells that are type leaf cells.
Answer:
a) Scales of pine closes and opens up with the variation in moisture content of air.
b) Cold sunglass meets warm moisture laden air and hence water droplet are suspended on the surface of sunglass.
Explanation:
a) Being a natural hygrometer, pine cone through its physiological activities indicate the presence of humidity in air.
The ridges of the pine consists of scales and the seed is inside it. In a humid environment, the scales absorbs moisture and swell and close the cone. This also prevents the seed from rotting due to excess moisture. With the reduction in moisture content of air, moisture in the scales of pine cone evaporates and the cone open up.
b) Sunglass gets cold since it is inside the airconditioned temperature of car. When the sunglass is placed outside the car window, moisture laden hot wind strikes the cold sunglass and it suspends its moisture there on the surface of glass as water droplets.
Deletion would be your answer isnt this a exam???
