Question

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here ur question

1) what are the reasons for night vision of owl?
2) when light flash on human eye, their eye become blank ? why ?
3) how animals eye glow when light fall on them ?
4) physiology behind phototropism .
5) physiology behind touch me not plant .
6) some trees sleep during evening time . why ?
7)why do we yarn ?
8) green hose effects in neccessity ?
9) what are the changes taken place in our body is called ?
10)weight of human brain ?


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Answer 1

1) Owls have good night vision for a fewreasons. First, they have a lot more rods and not as many cones, so they lose colorvision, but see a lot better at night. Also their eyes are very large, so they pick up a lot of light rays. Owls have a sort of mirror at the back of their eye called the tapetum lucidum.

2)Floaters can be caused by normal aging of the eye when the vitreous jelly begins to shrink. Other causes of floaters include the sudden release of blood cells from the retinal blood vessels or pigmented cells from underneath the retina into the vitreous jelly. This can occur with the tearing of the retina.


3) The glow of red human eyes is a little like the glow of the moon. It's the reflected lightof a far greater light source. ... Dogs, cats, and deer have blood, and their eyes don't look like vampire eyes. Their eyes glowbecause of a layer called the tapetum lucidum just behind the retina

4) Phototropism is the process by which plants reorient growth of various organs, most notably stems, in response to lateral differences in light quantity and/or quality. ... Upon visual inspection it is tempting to surmise that phototropic curvatures result from a relatively simple growth response to a directional stimulus.

5) Mimosa pudica is a perennial herb of the Fabaceae pea family and is native to Central and South America. Also known as the touch me not plantt or the sensitive plant, is well-known for closing its leaves (or folding its leaves inwards) when touched. ... Mimosa pudica, better known as ...

6) Trees Sleep, With Branches And Leaves Drooping at Night, New Study Says. Scientists have long known that plants have a day-to-night cycle. Some trees close their leaves in the evening. ... It isn't yet clear whether the sun or the plants' internal rhythm spurs the movement.

7) Yawning helps to cool your brain down from that clotting. Another reason you may yawn is because the body wants to wake itself up. The motion helps stretch the lungs and their tissues, and it allows the body to flex its muscles and joints. It may also force blood toward your face and brain to increase alertness.

8) The Greenhouse Effect. The greenhouse effect refers to the ability of the atmosphere to trap the sun's heat, increasing the temperature of the planet. ...Positive Effects.

The greenhouse effect is important, because it contributes to the survival of life on Earth. ...

Too Much of a Good Thing.
...
Extreme Effects.

9) All vital organs begin to lose some function as you age during adulthood. Aging changes occur in all of the body's cells, tissues, and organs, and these changes affect the functioning of all body systems.

10) The spinal cord weighs approx. 35 grams. The human brain weighs on average three pounds, or 1.5 kg. The human brain is about the size of a cantaloupe.



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