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Cycads
Encyclopedia entry from: The Gale Encyclopedia of Science
...called sporophylls. In contrast, the evolutionarily more recent angiosperms (flowering...seeds are borne naked. In the more evolutionarily recent angiosperms (flowering plants...ancient) characteristic. Other evolutionarily ancient plants, such as mosses...
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Genetics: Longevity Assurance
Encyclopedia entry from: Encyclopedia of Aging
...whereas public longevity genes are evolutionarily conserved and increase the longevity...essentially random process, longevity is evolutionarily adaptive. This idea was first formulated...longevity assurance mechanisms should be evolutionarily conserved (i.e., public). This...
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Pines
Encyclopedia entry from: The Gale Encyclopedia of Science
...whereas sieve tube elements are characteristic of the more evolutionarily advanced flowering plants. The oldest known fossil of the...two subgenera of pines, and botanists believe these are evolutionarily distinct groups. These subgenera are Diploxylon, commonly...
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Guppy
Encyclopedia entry from: The Gale Encyclopedia of Science
...phylum Chordata within the kingdom Animalia. Like many evolutionarily advanced organisms (including birds, reptiles, and mammals...helps control buoyancy. Guppies are also among the most evolutionarily advanced group of bony fish, known as Teleosts. Teleosts...
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Paleontology
Encyclopedia entry from: The Gale Encyclopedia of Science
...comparing different organisms to see how they are related evolutionarily (cladistics). The fossils that paleontologists study...symmetrical nor differentiated into tissues. Sponges are less evolutionarily advanced than members of the phylum Cnidaria, which includes...
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Tree
Encyclopedia entry from: The Gale Encyclopedia of Science
...grouped together in the family Pinaceae, because they are evolutionarily related. In turn, the Pineaceae and about six other families...the conifers, or cone-bearing plants) because they are evolutionarily related. Traditionally, plant taxonomists have relied...
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Attachment Theory
Encyclopedia entry from: International Encyclopedia of the Social Sciences
...attachment theory, the infant-parent attachment is an evolutionarily adaptive relationship whose principal function is the protection...earliest environments of human beings such relationships were evolutionarily advantageous. In addition to his concern with all people...
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central nervous system
Book article from: The Oxford Companion to the Body
...nervous system ) that innervate the heart, the bronchial tree, the smooth muscle of much of the gut, and various glands. Evolutionarily, the central nervous system is derived from the repetitive, segmented chain of nerve cells found in invertebrates, and...
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Psychosomatics, Social
Encyclopedia entry from: International Encyclopedia of the Social Sciences
...bodies release adrenaline in preparation to either face or flee from an environmental stressor. While this was at one point evolutionarily adaptive, and remains so in situations requiring split-second decisions, long-term activation of this stress response...
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sturgeon
Book article from: The Columbia Encyclopedia, Sixth Edition
sturgeon primitive fish of the northern regions of Europe, Asia, and North America. Unlike evolutionarily advanced fishes, it has a fine-grained hide, with very reduced scalation, a mostly cartilaginous skeleton, upturned tail...
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