Answer to Question #67165 in Zoology for Wania




 How do birds fly in air easily
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flying insects use the sun or the brightest light source as a reference for navigation. the sun or moon work nicely since they are a great distance away making the light rays, for all practical purposes (like navigation), parallel to each other. the insect observes the angle of the point of light as it starts its journey and returns simply by flying the reciprocal or opposite angle for the same length of time.

the problem for the insect comes when it uses a nearby source of light such as a light bulb as it navigates. the rays from a bulb are no longer strictly parallel since light is emitted from all points of a relatively large global surface of the bulb. as the insect tries to maintain a constant light-to-eye angle it has to make constant corrections by turning in flight. this results in a spiraling flightpath bringing it closer and closer to the bulb until they are, shall we say "overcome by the heat", or they run into the window glass. this happens because the speed of light is faster in air then that of the speed of sound. They move the moisture out of the dryer and into whatever environment they are in, such as a room. probably. some people get f****** offended so god d*** easy. a) false. the breakdown of glucose into carbon dioxide and energy is done using oxygen inside the cell. this process is known as respiration.b) true. likewise humans frogs also can respire through lungs. in addition to lungs frogs can also respire through their skin which is thin, moist and slimy and help in easy gaseous exchange.c) false. spiracles are the tiny pores present in the insects like cockroaches which help in gaseous exchange. these small spiracles are present on the lateral body (sides) of the organism.d) true. the percentage of co2 in inhaled air is 0.04% whereas in exhaled air it is 4.4%. therefore, we can say that exhaled air has more percentage of carbon dioxide than in the inhaled air. no problems with that. it's quite normal the behaviour of most of the people was good towards the animals. some benefits of the wind:

1. transportation

wind is used to propel sailboats, hot-air balloon, and aircrafts. aircrafts can increase their ground speed and cut down the flight time with the help of tail wind.

2. wind power

wind can power wind turbines to generate electricity. large scale wind farms can generate enough electricity to power many cities.

you can get more info and see some pictures here:

http://en.wikipedia.org/wiki/wind\_power

3. recreations

wind figures prominently in several popular sports, including recreational sailing, windsurfing, and kiteboarding. finally, wind enables the simple pleasure of flying a kite.

http://en.wikipedia.org/wiki/sailing
http://en.wikipedia.org/wiki/windsurfing
http://en.wikipedia.org/wiki/kitesurfing
http://en.wikipedia.org/wiki/kite\_landboarding solution: there are five common features in stanza 2. these features are the sun, the air, the water, peaceful harvest, hands and the labour. given statement is true.