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32 Cards in this Set
- Front
- Back
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Coelom is a body cavity derived from the _________.
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mesoderm
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Which embryonic tissue gives rise to the endoskeleton?
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endoderm
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Which embryonic tissue gives rise to the epidermis?
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ectoderm
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Which embryonic tissue gives rise to digestive tract?
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mesoderm
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The process of molting is also known as ____________.
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ecdysis
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Arthropod segmentation occurs via ___________ growth.
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teloblastic
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First tagma (body region) in spiders.
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prosoma
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Second tagma in scorpions.
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opisthosoma
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Tagmosis is.........
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regional specialization of body parts.
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Arthropod appendages are primitively __________.
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biramous
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1st part of protopod
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coxa
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2nd part of protopod
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basis
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Water bear is the common name for __________.
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tardigrades.
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What are chelicera?
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Spider head appendages
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Protostome form of cleavage
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spiral
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Deuterostome form of cleavage
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radial
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The stereom ossicle is found in _______________ (what phylum?)
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echinoderms
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An urchin's skeleton is known as a _________.
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test
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A sea dollar's ambulacrum is also known as a ________.
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petaloid
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Tiny defensive parts known as pedicellaria are found on ___________ and ____________.
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Urchins; some sea stars
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_____________ pouching is mesodermal and occurs in _________.
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Archenteric; deuterostomes
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What is the madreporite?
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Opening to the WVS
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Gill slits are openings of the chordate ___________ to the outside.
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pharynx
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Stiff rod of skeletal support
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notochord
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Where is iodine produced in chordates?
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pharynx
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What becomes the mouth?
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blastopore
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What happens in echinoderm embryogenesis during gastrulation?
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A. Blastopore becomes the anus
B. Invagination leads to the formation of the archenteron (embryonic gut tube) |
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Echinoderm gastrulation occurs by ____________.
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Invagination
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The pair of appendages that are pincer-like and known as pedipalps are found on ________.
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scorpions
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The pair of appendages that are known as chelicera are found on __________.
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spiders
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Primitively, arthropods have how many pairs of jointed appendages per segment?
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1
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A thoracic appendage modified for food handling is called a ______________.
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maxilliped
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