It is the respiratory system that allows for the exchange of gasses.
Answer:
They have some prokaryotic cells though they are being regarded as eukaryotes.
Explanation:
Cells are the basic functional unit of life
Eukaryotic cells have membrane bound nucleus while prokaryotic cells don’t have this.
The body of the tiger consists of different types of cells such as nerve cells, muscle cells, olfactory cells, digestive cells etc. An aggregation of these cells is what makes up the different types of systems ( digestive system, nervous system).
Though animals and human beings are widely regarded as eukaryotic they still possess some cells in the body which are prokaryotic. These prokaryotic cell include cilia which line the respiratory system.
Answer: D
They often occur spontaneously, because when energy is released during a chemical reaction it does not usually happen slowly.
