Answer:
The basic structure and function unit of life.
Explanation: ...
The main function of the respiratory system is to allow the exchange of gases between the atmosphere and the lungs.
Hence,the only structure that carries out this function is the alveoli as other structures such as the nose,trachea and pharynx transport gases to the alveoli just so that it can can out its function.
Answer:
The introduction of Coqui frog took place accidentally from Puerto Rico into Hawaii in the year 1988. The introduction of the frog species has posed a danger to the island ecosystem of Hawaii and is also a source of major noise nuisance. The species of the frog has an enormous urge to eating, which is putting the native species of spiders and insects of the island at a greater risk.
The Coqui frog species can even thrive in distinct ecological zones and heights in the region and are also witnessed at the height of 4000 feet above the level of the sea. These frogs can also compete with the local fauna and the endemic birds, which are solely dependent on insects as the source of their food.
I believe the correct response would be D. A polygenic trait encodes for something as melanin concentration in one's skin, skin colour, height etc. These vary quite immensely from person to person, for instance, and can not only be stated as discrete categories in terms of phenotype, as short and or tall. Since the many phenotypes are based on the appropriate Genotypes, there must be many possible Genotypes as well to code and or provide for these diverse phenotypes within a given polygenic trait.
