Study Guide 1 Flashcards
Who was Linnaeus and what were his ideas?
He was a biologist who sought to classify all life and organized organisms into nested groups with clear hierarchies. The idea of species departing from their ancestral type was an idea he shared with Darwin.
How old is the Earth?
4.5 billion years.When know because of the radiometric dating of Rubidium-87.
How old is life on earth?
3.8ish billion years old, originating at archaea (bacterial mats and stromatolites) Multicellular life is 2.1 byo and are eukaryotes. Early animal life was 650 MYO and resembled sponges.
Who was Darwin and what were his ideas?
Darwin was a dude. His criticisms were not received lightly. He said: variation occurs at all levels, populations vary, species tend to be distinct, and species differ more among than within genera.
Who was Lamarck and what were his ideas?
A dude who argued for evolution, who think they changed over time and adapt to their environment, however, he thinks individuals can evolve & strive to improve. This drives life to be “complex”.
Who was Lamarck and what were his ideas?
A dude who argued for evolution, who think they changed over time and adapt to their environment, however, he thinks individuals can evolve & strive to improve. This drives life to be “complex”.
Who was Wallace and what were his ideas?
Admired Darwin and sent him an essay about “the species problem”. He basically got Darwin’s idea right which prompted Darwin to publish ASAP. Became famous for biogeography. People didn’t like his or Darwin’s ideas.
What are ways we can date how old things are?
Radiocarbon dating, eruption layers,etc. Zircon crystals and C isotopes in old rock.
What are some key innovations of life?
DNA, photosynthesis, cells, sex, multicellularity, death.
What is the advantage of being a eukaryote?
Have their own personal power plants (which only happened once).
What were some biodiversity explosions?
Camrian explosion where new body plans & such developed and had a “long fuse” and chrodates, Paleozoic (trilobites with easy-to-fossilize shells)
