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27 Cards in this Set
- Front
- Back
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Define and organism
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a living entity made up of one or more cells
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Things livig organisms need to survive
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energy(respirations/Photosynthesis)
cells information(dna, etc) Replication Evolution homeostasis |
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Who is Anton Van Leeuwenhoek?
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developed more powerful microscopes than hooke
magnifications 300x Made first observations of human blood cells and sperm cells |
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Bacteria
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smallest organism known
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What is a cell
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highly organized compartment bounded by a thin, flexible structure(plasma membrane)
contains concentrated chemicals in watery solutions |
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2 components of scientific theory
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1) DESCRIBES PATTERN IN NATURAL WORLD
2) process that is responsible for the pattern |
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Cell Theory
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All organisms are made of cells and all cells come from pre-existing cells
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hypothesis
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proposed explanation
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prediction
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something that can be measured that must be correct if a hypothesis is valid
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Louis Pasteur
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Tested "all cells from other cells hypothesis using broth in straight neck flask and swan necked flask
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Evolution
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change in the characteristics of a population over time
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Natural Selection
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explains how evoltion occurs
proposed by Darwin and Wallace |
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2 conditions where natural selection occurs
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1) passed on traits
2) certain traits that help for survival and reproduction are passed on |
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Artificial Selection
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changes in population that occur when humans select certain individulas to produce the most offspring
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Fitness in Bio
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created by Darwin
ability of an individual to produce offspring |
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Adaptation
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trait that increases fitness of an individual in a particular environment
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Speciation
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where natral selction has caused populations of one species to diverge and form new species
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phylogeny
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organisms actual genealogical relationships
created by carl Woese |
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rRNA
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small subunit ribosomal RNA
essential to cells for growth and reproduction made of four smaller chemical compenents(ribonucleotides)-(A, U, C, G) can change during evolution |
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Eukaryotes
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cells with a nucleas
many are multicellular |
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Prokaryotes
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cells without a nucleas
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Taxonomy
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effort to name and classify organisms
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what are the three domains of life
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Bacteria
Archaea Eukarya |
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phylum(phyla)
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major lineages within each domain
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Carolus Linnaeus
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created a system for naming species (scientific name)
2part 1) genus(closely related group of species) always capitalized 2) identifies organism's species |
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Null hypothesis
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observe when the hypothesis being tested isnt correct
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control group
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checks for factors other than the ones being tested
conditions must be as constant and equivalent as possible |
