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Both Fish and Mammals have ventilation mechanisms. Explain the function of ventilation mechanisms and name the muscles which operate the ventilation mechanism in mammals.

The function is to move the respiratory medium (air or water) over the respiratory surface; to maintain the concentration gradient. In mammals, the diaphragm and the intercostal muscles are responsible fo...

Answered by Bobola A. • Biology tutor

9616 Views

What are the different types of prepositions and how do I know which one to use and how?

There are 3 types of prepositions, akkusativ, dativ and genetiv. Akkusativ is when something is the object in the sentence and is certain prepositions like fuer and durch that always take akkusativ. This ...

Answered by Emily O. • German tutor

2471 Views

'In 'Frankenstein' the Monster is not a villain, but a victim.' Discuss.

Mary Shelley's 'Frankenstein' (1818) deals with the transgression of bodily and scientific limitations, and portrays the disastrous consequences of doing so. The Monster is, both within the world of the n...

Answered by Laura B. • English tutor

13908 Views

What is the difference between benzene and cyclohexene?

Benzene, aromatic and unsaturated compound which alternating double bonds. Benzene only reacts with bromine when a catalyst is present. Cyclohexene will react with bromine readily, a saturated molecule wi...

Answered by Imogene B. • Chemistry tutor

40546 Views