Question

Ricardo scooped up some pond water that contained many GREEN organisms. His teacher suggested that he key out the organisms. What important feature(s) should Ricardo use to determine if the organisms are plants?

Answer 1

check for cell walls and cells needed for photosynthesis, also check sugar and chemical reactions that are exhibited to determine if they are indeed plants

Answer 2

He can see if they are green and he can also determine where they came from.