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28 Cards in this Set
- Front
- Back
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Echinoderms |
sea stars sea urchins |
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Hemichordates |
burrow in marine sands |
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Vertebrates |
animals w/ backbones |
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Three Major Lineages of Chordates |
Cephalochordates Urochordates Vertebrates |
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Cephalochordates |
small, mobile, torpedo-shaped animals suspension feeders |
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Urochordates |
"Sea Squirts" |
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Tetrapods |
large herbivores and predators in terrestrial enviroments |
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Oviparous |
Egg-laying animals |
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Viviparous |
Species that give live birth |
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Ectotherms |
animals which don't use internally generated |
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Endotherms |
animals which produce their heat within their tissues |
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Prosimians |
paraphyletic group of primates mainly consisting of lemurs and other small monkies |
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Anthropoids |
includes the great apes (same as hominids) |
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hemimetabolous |
juveniles grow and shed their skeletons over time to become sexually mature adults |
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molometabolous |
distinct larval stage and distinct adult stage |
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ecdysis |
shedding of the cuticle |
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What are the four mollusk lineages |
bivalves (muscles/clams) gastropods (slugs/snails) chitons cephalopods (squids/octopusses) |
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What does a parent stem cell divide into? |
1 undifferentiated stem cell 1 cell that will differentiate later |
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morphogens |
molecules which cells detect in different concentrations to learn their position |
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bicoid gene |
codes for morphogen which tells cells where they are located along the anterior-posterior axis |
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auxin |
plant equivalent of bicoid |
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apoptosis |
predominant form of programmed cell death used in animals |
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Effector genes |
expression of effector genes leads to production of specialized proteins/structures in undifferentiated cells |
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organogenesis |
formation of specialized groups of tissues |
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somites |
undifferentiated balls of cells that undergo differentiation |
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Gap genes |
control formation of groups of segments that define large body regions |
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pair-rule genes |
controls the formation of individual segments |
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segment polarity genes |
create anterior-posterior axis within each segment |
