What is the difference between chromosome number and ploidy?

Explain why phospholipid molecules form a bilayer. (3 marks)

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present

Speed is the ratio of the distance of an object moves to