Which of the following statements is NOT TRUE about cells? Cells were first observed in 1665
Plant and animal cells do not share any organelles in common
Cells come in many different shapes and sizes
Organelles are smaller parts within a cell that perform certain functions

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

answer denitrification;