Across

1.interaction of biotic and abiotic factors in an area

2.example of an organ system

4.consists of different tissues organized together to perform

5.example of organ

7.example of an organism

8.a group of organisms of the same species involving a given region

10.groups of atoms that bond together

11.an example of molecules and it composed of two elements hydrogen and oxygen

13.an example of an ecosystem and consists of different trees

Down

1.consists of all different species within a certain area

3.portion of the earth with living things

6.a group of cells working together

9.smallest structural and fundamental unit of an organism

12.example of biosphere and where we can live

14.an example of organ system and one part of this brain ​