D. Phenotype because a phenotype is observable traits
Answer:
The cell theory developed most quickly due to the invention of the microscope. Robert Hooke was the first scientist who saw cells in cork. After this discovery, a wide numbered of researches were made and cell theory was developed. The basic cell theory explained that how every living thing was made up of cells. After this, a lot of additions have been made in the cell theory and today the cell theory is known to have five basic postulates.
A sea anemone because they have a symbiotic relationship. The clown fish is kept safe when in the sea anemone from predators. They clown fish also eats the left overs on a sea anemone! :)
Answer:
the limestone is the youngest, and therefore the top most rock layer found at the Grand canyon
