1.angiosperm: Flowering plant.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjEfmXW-nmKMRPYIBguQ_PKau8DFBFdJortPW-lazYgx7d94Z6_yJSqRl0pfysZQBBB5MByvIqM4IV5iD3kjbPuT5nIrpFnYTrX_YqwaLn51uJnfbkjHD1u6n2Q4ieacI0JJIxxGIc4VKRz/s320/angio.jpg)
2. archaebacterium: Member of the prokaryotic domain Archaebacteria.
3. Archean eon: Eon in which life arose (3.8-2.5 bya).
4. big bang: Model for origin of universe.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2D4oR4z4OiVHGHSH_ZEqGfPpP7sCnbN_hv8KDr7tyhnPJB14ZfXhYh-RDGF8wbD7bdEuUPFa9Tw1xFjnGC6zVemmtezIpdduntZLiKoCs-be3kKhNNKp5NPyLQy7fhVPVeGw_tdINBdvU/s320/bb.jpg)
5.Cenozoic era: The present era (65 mya to present).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhZqDip33f3DmfnY0YNPLRO4-XbhGl0w-BGTxPww-2t4tgCsYGhd8mZtAkk4i-uwyTvx1Ay_0tfxOAT8NJSCkwCEhHBoqpNaReaS6McjS1GMj86G5JPGeav6VMgQ1iD3MtpwqXiMT9nmoF3/s320/ceno.jpg)
6.crust, of Earth: Outer zone of low-density rocks resting on the Earth's mantle.
7.dinosaur: One of a fabulous group of reptiles that originated in the Triassic and became the dominant land vertebrates for 125 million years.
8.Ediacaran: One of the species with a highly flattened body that arose in the precambrian.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9XX3iGfOPSrb_iDo-U-mFo9W-69Kh9O96J-T7TSnPLgyXZIeaCRVilJAqPLgRiASRl1E0xU5-yH6XUGusVk60e0t5P7bprZxlBcY0DIXyOIBgrBvQ81vsIAebU1HIILOc3JTq16gWjNUB/s320/edi.jpg)
9.endosymbiosis theory: Continuing physical contact between two species, one of which lives and reproduces inside the other's body.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiz7m_fKFaTC1afyEbCGs8ulI5wER2X5b_Feb26FdC3sOB_P7VQSwnjqGGnfI6CUdxg8PBec6NeWdwiW9LYdDg3VI14cLSSuo016lsF33MnOZAwYo47awSvBcVBDlpphGONYWEM8Vtq0Iok/s320/endosymbiosis.jpg)
10.eubacterium: Prokaryotic cell; has a nucleoid, but no nucleus, cytoplasm, or cell membrane; most have a cell wall, some encapsulated.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiABr3I5sSeNyAx84xliIR-Wx2JujfwrgnUQgblWUjimfG2wggRZaE_CejpF_l_8a5jwX7ZIV352xFOSYJthBtGdK6AEFaMdAJyOtV1ApunilZuYqredOPvuxic-qPP-fciAWLa3BgGGkQG/s320/eubacteriq.jpg)
11.eukaryotic cell: Cell having a nucleus and other membrane-bound organelles.
12.global broiling hypothesis:Theory that an asteroid impact caused the K-T mass extinction by creating a colossal fireball, the debris from which raised global air temperature by thousands of degrees.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiv78hj6ml8rBktfQ7boRS8pQJlABn6qREPtz2Ite2KT85jSAQ5BuyvqYyFE-RfSeL08xx0q3nbDixBNX7oJOwVKdC6Cm_bPTxBC4bKimLdzE6OgDzgy9JOjyDOORxLlaEo9ZdV2BR6anMV/s320/gbh.jpg)
13. gymnosperm: Type of vascular plant in which seeds form on exposed surfaces of reproductive structures (e.g., on cone scales).
14. K-T asteroid impact theory: A huge asteroid hit Earth at the K-T bou
ndary; last dinosaurs perished during the mass extinction.
15. mantle Of mollusks: a tissue draped over the visceral mass. Of Earth, a zone of intermediatedensity rocks beneath the crust.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfvppXHXaSBrIcCsgB70dWHPkOWm3vlj4TqfN8EPzu5xtN9BvtEPlNMoMzN45Hb-XO9EfzXJ-s3RqYU33XJKTIz1il0jg2CpZkT1fypMLDsXyyDHsv8qoEhElfhOs85IhT01jB4gHcxldb/s320/mollusk.jpg)
16. Mesozoic era: An era (240-65 mya) of spectacular expansion in the range of global diversity.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6Dhg7nMDw__nkm6TI4sHSIAYyvbM4TTb8OnvYFqIBaCG1LL863iu7AKmR9u2gDCRFQS3HyZ4RLox4WiMJuBU8J5CGnMihbIIeBJpGdw9ZH6YHqRVTj-13CQAdJpQ7mBEH9Z5p3_3vKti3/s320/mesozoic.jpg)
17. Paleozoic era: Era from Cambrian, Ordovician, Silurian, Devonian, Carboniferous, through the Permian (544 to 248 mya).
18. prokaryotic cell: Archaebacterium or eubacterium; single-celled organism, most often walled; lacks the profusion of membranebound organelles observed in eukaryotic cells.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh44DemPOEotc4E8-Dhd4wJaCEBRGhADt7j8qwNvrwKD7XD8MvuPTpvf8LobAxf01-msZyvAUqwNGcdsuPsvvcPlxbSFrY5q0ShbwOdqlpRyRnh7UZKBko3lFGC7DGjbrJL8aM4aWBcN_WU/s320/prokaryiotic+cell.jpg)
19. Proterozoic eon: Period from 2.5 billion to 570 million years ago; period during which eukaryotic cells arose.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkg609HSGfJXe5qmK9PMV9qYSuOi8ukLpgKWBTWgMCXro4A2sQ8b2tZxVbg7NdYUuRpZh1mJ_Y_lTPhVY00ZJmCH5Q1FIFSuZ73_6ATD0KvcrtSR8nLP8xbhDKYRN0Euhx1ydq74yU7Psk/s320/proterozoic+eon.jpg)
20. protistan: Photoautotroph or heterotroph (or both) unlike bacteria; some like earliest eukaryotic cells. Has a nucleus, larger ribosomes, mitochondria, ER, Golgi bodies, chromosomes with numerous proteins, and cytoskeletal microtubules. Range in size from microscopic algae to giant kelps.
21. proto-cell: Hypothetic cell-like stage between chemical evolution and the first living cell.
22. RNA world: One model for prebiotic evolution in which RNA was the template for protein synthesis before the evolution of DNA.
23. stromatolite: Fossilized mats of shallow-water microbial communities, mainly cyanobacteria, from Archean to precambrian. Cell secretions blocked UV radiation but trapped sediments, and new mats grew on old ones; some are half a mile thick and hundreds of miles across.
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