1.1 Introduction to cells

what is life? 

life refers to anything that shares characteristics of MR SHEING:

ͻMetabolism
ͻ Reproduction
ͻGrowth
ͻ Responding/Sensitivity
ͻ Excretion
ͻNutrition
ͻHomeostasis

Functional characteristics could be classified as:

structural, biochemical, physiological, or behavioral traits

• All life has a cellular structure. 
• All living things can grow and/or develop the lifespan.
• All life can response and change according to the environment. 
• All life does metabolism 
• All life maintains homeostasis.
• All life exchanges energy and matter with the environment
• At the population level, life adapts and changes over time.