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Term
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| Annelids have bodies composed of a series of ___. |
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Definition
| Earthworms eat their way through the soil, extracting ___, making them valuable to ___. |
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| Members of class ___ possess paddlelike bristles that function as gills and aid in locomotion. |
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Definition
| leeches, members of class ___ are blood-sucking parasites. |
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| In 1833 alone, ___ (a number) leeches were imported from Britain into France for medical use. |
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Definition
| Tropical rainforest leeches are ___ (where they live) |
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| ___ are segmented coelomates. |
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| Two out of every three known species of animals are ___. |
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| Members of the phylum ___ are found in nearly all habitats of the planet. |
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| Early arthropods, such as ___, show little variation from segment to segment. |
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| As arthropods evolved, the segments ___, and the appendages became more ___. |
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| The arthropod body is completely covered by the ___, an exoskeleton made of chitin |
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Definition
| The arthropod body is completely covered by the cuticle, an exoskeleton made of ___ |
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Definition
| When an arthropod grows, it molts is exoskeleton in a process called ___. |
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Definition
| Molecular evidence suggest that living arthropods consist of ___ lineages that diverged a very long time ago. |
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Definition
| Arthropods have a ___ circulatory system in which their green blood is circulated around the organs. |
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Definition
| What color is an arthropod's blood? |
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| Arthropods have evolved a variety of organs for ___. |
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| ___ are named for clawlike feeding appendages called chelicerae. |
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Definition
| ___ are clawlike feeding appendages we might call fangs |
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Term
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Definition
| this subphylum includes spiders, ticks, mites, scorpions, and horseshoe crabs. |
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Definition
| Most of the marine cheliceriforms are ___, but some species survive today, including the horseshoe crabs. |
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Definition
| most cheliceriforms are ___, a group that includes spiders, scorpions, ticks, and mites. |
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Term
| abdomen and cephalothorax |
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Definition
| What are the two main segments of an arachnid? |
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Definition
| Arachnids have six pairs of appendages, the most anterior of which are the ___. |
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Term
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Definition
| Arachnids have six pairs of appendages, the most anterior of which are the ___. |
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Term
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Definition
| subphylum ___ includes millipedes and centipedes. |
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Term
| millipedes, class diplopoda |
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Definition
| ___, class ___ have a large number of legs, two per segment. |
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| centipedes, class chilopoda |
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Definition
| ___ class ___ are carnivores with jaw-like mandibles. They have one pair of legs per trunk segment. |
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Term
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Definition
| subphylum ___ are more species-rich than all other forms of animal life combined. they live in almost every terrestrial habitat. |
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Term
| abdomen, thorax, and head |
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Definition
| the three body parts of an insect are what? |
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Term
| incomplete metamorphosis; nymphs |
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Definition
| in ___, the young, called ___ resemble adults but are smaller and go through a series of molts until they reach full size. |
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| Many insects undergo ___, where the larval stage looks entirely different from the adult stage. |
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Definition
| Metamorphosis occurs during a ___ stage. |
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| Insects are classified into about ___ orders, including the Coleptera and the Lepidoptera. |
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Definition
| Crustaceans have mostly remained in ___ and ___ envirnoments. |
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Definition
| ___ are all relatively large crustaceans and include lobsters, crabs, crawfish and shrimp. |
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Definition
| planktonic crustaceans include ___, which are among the most numerous off all animals. |
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| ___ are copepods consumed in vast quantities by whales. |
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Definition
| ___ are sessile crustaceans, whose cuticle is hardened into a shell. |
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Definition
| At first glance, sea stars and other echinoderms, phylum ___ seem to have little in common with the vertebrates. |
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Term
| calcium carbonate (limestone) plates |
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Definition
| Echinoderm's spiny skin covers a skeleton of hard ___ plates. |
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Definition
| Echinoderms have a ___, a network of hydraulic canals for locomotion, feeding and gas exchange. |
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| Interestingly, the radial anatomy of the echinoderms evolved ___ from their ancestors' bilateral symmetry. |
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