module 2

• living organisms -are characterized by a highly organized structure and arranged in hierarchical pattern.
• atom -a fundamental unit of matter

  
• molecule -is a chemical structure consisting of at least two atoms held together by one or more chemical bonds

  
• organism -an individual form of any kind of life; an animal, plant, fungus, etc.; an individual member of a species
• organelle -formed from molecules, a structure that has a specific function within the cell.

  
• cell -the building block of all organisms

  
• prokaryotes -are single-celled organisms that do not have membrane-bound organelles
• eukaryotes -have membrane-bound organelles like the nucleus

  
• tissues -group of similar cells performing specific functions within an organism

  
• organs -are collections of tissues grouped performing a common function, it is not only present in animals but also in plants

  
• organ system -a higher level of organization that consists of functionally elated organs.

  
• organisms -are living individual entities, simply defined as any living thing that is composed of various organ systems that function altogether

  
• population -a group of organisms of the same species living together within a specific area/habitat are collectively
• ecosystem -group of organisms having an interaction with non living environment
• biosphere -the highest level of biological organization
• community -is a group of organisms composed of different species living and interacting in a certain area or habitat