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-- It would float in the water, with part of it above the surface. -- It would hang just below the surface, or at whatever depth you placed it. -- It would sink down through the water like a rock.
The mosquito pupae hang just below the surface of the water in order to draw oxygen from the atmosphere through two tubes on their backs.The pupae can also swim under the surface of the water when disturbed,but ultimately have to return to the surface at some point to draw more oxygen.If the pupae is unable to draw oxygen for some reason,for example a film of oil has appeared on the surface,then they will die. Mosquito larvae behave in the same way,drawing oxygen from tubes at the tail end,the larvae go through 4 stages of growth,shedding skin each time,before becoming pupae,which then emerge as a full adult mosquito.most species of mosquito larvae have to draw oxygen in this fashion.
The mosquito larva breath by putting their posterior on to the water surface film and breathing air. At one time spraying DDT was used on mosquito breeding areas to destroy the larva. Unfortunately, the side affect to wildlife proved too great to allow DDT to continue - and DDT was banned.
Mosquito larvae hang below the water surface to lessen chances of being seen by predators. Also, this allows them to feed off food on top of the water easier.
Hang Glider
hang on to the water wagon
To decrease the amount of surface area of the plant exposed to the sun. This decreases the amount of transpiration therefore minimising water loss.
in water
If you have floated a needle on the surface of the water in a glass then adding a little detergent will cause the needle to sink. This is because the presence of the detergent changes the surface tension of the water so that it can no longer support the needle.
they get the hang of it a throw seconds after birth but un till then the mother will hold the baby's head out of the water by going under the young and pushing towards the surface
The needle floats on the tensioned surface of the water. When the detergent is added, the surface tension is broken and the needle sinks. Larva of mosquitoes hang from the surface to breath air. Pond-skaters can move across the surface, as can many aquatic insects. Detergent will also cause insects to sink.
they get the hang of it a throw seconds after birth but un till then the mother will hold the baby's head out of the water by going under the young and pushing towards the surface