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30 Cards in this Set
- Front
- Back
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Organisms that live in the bottom of the ocean must be able to withstand high ___; they are known as ___.
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Hydrostatic pressure, piezophiles
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Plants use sunlight to convert ___ and ___ into carbohydrates.
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carbon dioxide, water
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Organisms that undergo photosynthesis are known as ___; they obtain their carbon source from ___.
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photoautotrophs, carbon dioxide
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Hot vent producers are ___; they derive their energy from ___.
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chemoautotrophs, hydrogen sulfide
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Methane that is released from the seabed forms the cource of ___ for the Archaebacteria in the ___.
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energy, cold seep
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Water is a stable ___ molecule, making it an exellent ____.
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polar, ionizing agent
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Most biological molecules can be dissolved in ___, which provides an excellent medium for chemical reactions to occur.
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water
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Martian suface shows geologial features of ancient rivers, ___, and ___that have gone dry.
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lakes, oceans
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Mars Twin Rover Expedition has discovered Martian rocks with ___ layers that can only be formed in the presence of ___.
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sedimentary, water
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Europa is one of the four moons of ___ discovered by ___ in 1610.
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Jupiter, Galileo
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Signs of microorganisms were revealed in a sub-glacial lake, known as ___ int the ___.
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Lake Vostok, Antarctica
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the Milky Way Galaxy was formed ____ billion years ago and has ____ billion stars.
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13.6, 200
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The Universe was born ___ billion yrs ago and organized in to ___ billion galaxies which form clusters and superclusters.
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13.7, 10
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The satellite known as ____ was launched in 2001 to survey the cosmic ____ background radiation.
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W-MAP, microwave
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The universe expanded a trillion fold in a process known as ____ before forming teh stable ____ atoms.
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inflation, hydrogen
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Stars are composed mostly of ____, and they obtain their energy to glow by the fusion of ____ atoms to form helium.
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hydrogen, hydrogen
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Our sun is composed of ___% of hydrogen and ___% helium.
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70, 30
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Nuclear fusion of astar stops when it accumulates too much ____. It dies by initiating a ___ explosion.
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iron, super nova
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All the elements found in the _____ are formed in the ____.
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Periodic Table, stars
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The endangered species status of the red wolf was once doubtful, b/c it was not considered as a species; intstead it was thought to be a hybrid b/t the ____ and the ____.
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grey wolves, coyotes
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The common biological definition proposed by Ernst Mayr states: Groups of actually or potentially ____ natural populations which are ____ isolated from other such groups.
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interbreeding, reproductively
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The ____ definition was used by Linnaeus in his classification system that is based of the concept of ____ of species.
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Typological species, fixative
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The four species definitions used in biological classification are ____, ____, ____, and ____.
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typological, morphological, ecological, biological.
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5 challenges in defining species:
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1. Modes of reproduction
2. Phenotypic variations 3. Different types of organisms 4. Ecological niches 5. Fossils of extinct organisms |
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2 most important considerations of the pluralistic species definition are to achieve ____ and ____.
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cohesion, parsimony
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The 3 mechanisms of speciation are: ____ speciation, ____ speciation and ____ speciation.
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Allopatric, sympatric, parapatric
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Speciation is a multi-step process that takes place over many generations. The first step of mutation is when 2 populations become ____ isolated from eachother. This prevents interbreeding and blocks ____.
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geographically, gene flow
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New traits occur through mutation; these traits will assume by the population through ____ and ____.
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natural selection, genetic drift
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There are only two species of orangutans in the world, they live in the tropical rain forest of ____ and ____.
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Sumatra, Borneo
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The frequent type of speciation is known as ____ speciation, which is caused by ____, leading to the interruption of ____.
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Allopatric, geographical isolation, gene flow
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