Lecture 2- Emergent properties of life Flashcards
what are the two ways to harness and utilize energy
autotrophs and herdrothrophs
what are autotrophs
they combine water and co2 to create glucose by photosynthesis
it starts the flow of energy
what is the most important biochemical process
photosynthesis
what are heterotrophs
they use glucose and ATP for energy
they rely on autotrophs
what are some characteristics of organisms
they respond to stimuli and mail homeostasis
they reproduce
they evolve
what are some examples of organisms responding to stimuli and maintaining homeostasis
for adjusting structure, function, behavior:
organisms adjusting there structure, function, and behavior
ie plants adjusting there pores and flowers move there head towards light
for homeostasis:
humans adjusting there internal organs
why is reproduction inportant
life needs to create more life otherwise species will extinct
what are viruses not living
because they cant reproduce on there own and cant grow with out attacking another cell
what is growth
it is the cumulative sum of cell proliferation and cell enlargement
what allows tissue to respond to outside changes with a certain degree of variability
genetic material
what is evolution
it is a change is heritable characteristics over successive generations
what does the membrane do for a cell
it separates the living cell from its nonliving surroundings
and compartments inside the cell
what is the plasma membrane composed of
a bilayer of lipids with embedded proteins
what is the structure of the lipids in the bilayer
they have hydrophilic heads made of phosphate and glycerol
and then two tails made of H and C chains. they are hydrophobic. on of the tails is a unsaturated fatty acid and the other is saturated
what is an emergent property
at each level new properties and rules emerge that cannot be predicted by observations and full knolage of the lower levels
each of the characteristics of life reflects the complexity of organization
