Bio 120 Lecture 5 origin of life Flashcards
Name 7 key characteristics or functions shared by living organisms?
(emergent properties)
1.display order
2.sensitivity or response to the environment.
3.Reproduction
4.growth and development
5.regulation
6.Homeostasis-ex sweating
7.Energy processing
are viruses considered to be living organisms?
no
how do viruses reproduce?
inside the cells of living hosts
what are viruses made up of?
outer protein coat that encases genetic material(DNA or RNA)
D virus replicate?
yes
virus _______ to the environment?
adapt
how do virus evolve ?
through changes in their genetic material (DNA or RNA)
are viruses made up of cells and grow?
NO
virus make their own energy,TRUE OR FALSE?
FALSE
What is OPARIN-HALDANE THEORY?
organic molecules can be formed from abiogenic materials in the presence of an external energy
who was involved in the Miller-Urey experiment and what did they identify?
Stanley miller and harold Urey(supervised)
identifies a variety of organic molecules.
name some organic molecules identified by the miller- urey experiment?
formaldehyde(CH20), amino acids, hydrocarbons
what are hydrocarbons
long chain of hydrogens and carbons
what did miller contribute about synthesis of organic molecules?
abiotically - a way that involves the absence of life or the absence of living forms.
simple organic molecules, including amino acids, the building blocks of proteins, could be synthesized from inorganic compounds such as water, methane, ammonia, and hydrogen, under conditions thought to resemble the early Earth’s atmosphere.
what were some diff hypotheses on the origin of life?
Reducing atmosphere
deep-sea vents
Extraterrestrial
principle producer of both oxygen and organic matter on earth.
oxygenic photosynthesis
what Is the assumption on origin of oxygenic photosynthesis?
in an ancestor of cyanobacteria
what was considered as the most important metabolic innovation in earth history?
Origin of oxygenic photosynthesis
name some areas that were helped from origin of oxygenic photosynthesis?
generate energy
reducing power directly from sunlight and water
what lead to rise of oxygen
release of o2 as an end product of water oxidation
what dramatically altered the redox state of earth’s atmosphere?
release of O2 as an end product of water oxidation
what allowed the evolution of AEROBIC RESPIRATION?
Biological availability of O2.
what is SYMBIOSIS?
Relationship in which organisms from two separate species live together.
ENDOSYMBIONT
type of symbiosis-one organism lives inside the other.