The Marmaray, connecting the European and Asian shores of Istanbul, is the world's first sea tunnel between two continents. Turkey has opened the world's first underwater rail link between two continents, connecting Asia and Europe and allowing Prime Minister Tayyip Erdogan to realise a project dreamt up by Ottoman sultans more than a century ago.
The labium forms the floor of the dragonfly's mouth, the labrum forms the top, while the hypopharynx is inside the mouth and is used in swallowing. Conceptually, then, the mosquito's proboscis is an adaptation of the mouthparts that occur in other insects. The labium still lies beneath the other mouthparts, but also enfolds them, and it has been extended into a proboscis.
The yellow fever mosquito (Aedes aegypti) is a mosquito that can spread dengue fever, chikungunya, and yellow fever viruses, and other diseases.The mosquito can be recognized by white markings on its legs and a marking in the form of a lyre on the thorax.lthough the lifespan of an adult A. aegypti is two to four weeks depending on conditions, the eggs can be viable for over a year in a dry state, which allows the mosquito to re-emerge after a cold winter or dry spell. The preference for biting humans is dependent on expression of the odorant receptor AeegOr4.