The Organization of Living Things

How are living things organized ?

Organization of Living Things molecules organelles tissues organs cells organ systems organisms

atoms - building blocks of matter, can not be broken down only rearrange six most important for life are C, H, O, N, S, P Atoms join to form molecules.

molecules Lipids Glucose Protein DNA Water

organelles Organelles are the functional units of cells. chloroplast mitochondria nucleus Golgi complex

cells Cells have all the characteristics of life

tissues tissues – a group of similar cells that perform a common function

organs organs - composed of a number of tissues that work together to perform a specific task

organ system organ system found in complex multicellular organisms a group of organs that cooperate in a series of related functions

organism

Biologist study organisms in large groups. communities populations ecosystems biomes biosphere

populations same species living in a particular place at a particular time able to interbreed - mate within the population

communities populations that live in the same area and interact (food, shelter)

ecosystem community and its physical environment ex: forest, prairie, coral reef

biomes large geographical area that has the same major forms of life that are identified by climate and vegetation ex: tropical rain forest, grasslands, desert

Biosphere includes all the life-supporting environments on the planet together with all the organisms that inhabit them