Answer: If the Euglena is kept on the wet mount and it is sliding towards the left on the mount then to observe the Euglena in the microscope it wet mount should be slide towards right.
The movement of Euglena can be slowed down doing this. This will help us to observe it under microscope inspite of its movement.
Compound microscope is used to view Euglena.
This statement is true. Early land animals indeed had gills as well as lungs. It is generally known that amphibians breathe through their skin, like how the lungs needed the skin for its respiratory. Fish have gills for breathing while mammals do have their nasal cavity and lungs for their gas exchange.
