Ch 26 Packet
Terms
undefined, object
copy deck
- The primitive atmosphere of Earth may have favored the synthesis of organic molecules because it..
- was reducing and had energy sources in the form of lightning and UV radiation
- Life on Earth is thought to have begun ... years ago
- between 3.5 and 4 billion
- Stromatolites are...
- banded domes of sediment that contain the earliest fossils
- Coacervates are..
- droplets that self-assemble when polypeptides, nucleic acids, and polysaccharides are mixed and cooled
- What is the proposed hpothesis for the origin of genetic information?
- short RNA strands were capable of self-replicating and evolved by natural selection of molecules that were most stable and autocatlytic
- Evidence that protobions may have formed spontaneously comes from...
- the abiotic synthesis of polymers from monomers dripped onto hot rocks and clay
- Polymer formation from organic monomers may have been facilitated by
- amino acid concentration on clay particles
- According to the theory of panspermia
- organic molecules, abiotically synthesized in outer space, may have reached Earth carried on meteorites.
- The hypotheiss that life origninated in the sea is based on
- the discovery and deep-sea vents and the inhospitable asteroid-crashing environment of early Earth.
- in the five-kingdom system of classification the fungi include...
- absortptive heterotrophs
- In order to place a newly identified species into one of the five kingdoms, the first piece of information you would need to acquire is...
- the absence or presence of a nuclear membrane
- Why are the five kingdoms now organized into three domains?
- to emphasize and reflect the divergence within prokaryotes: archae and bacteria
- What did Fox do?
- produced proteinoids in the laboratory by dripping monomers onto hot sand or clay
- What did Oparin and Haldane do?
- claimed that the conditions of primitive Earth favored synthesis of organic compounds
- What did Cech do?
- discovered RNA catalysts called ribozymes
- What did Whittaker do?
- developed the five kingdom system
- What did Miller and Urey do?
- produced organic compounds in a lab apparatus