Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
34 Cards in this Set
- Front
- Back
Nematoda
|
Pseudocoel
|
|
Cnidaria
|
Tissues but no mesoderm
|
|
Mollusca
|
Shizocoel
|
|
Echinoderms
|
deuterstomes
|
|
platyhelminthes
|
mesoderm but blind gut
|
|
arthropoda
|
exoskeleton
|
|
sponges
|
no tissues
|
|
homologous structures: insects and birds
|
triploblastic germ layers
|
|
homologous structures: insects and mollusks
|
mouth from blastospore
|
|
homologous structures: insets and centipedes
|
one pair of antennae
|
|
homologous structures: butterflies and bees
|
wings from exoskeleton
|
|
homologous structures: spiders and scorpions
|
chelicerae: Chelicerae are pointed appendages which are used to grasp food, and are found in place of the chewing mandibles most other arthropods have
|
|
homologous structures: crabs and shrimp
|
two pairs of antennae
|
|
What additional advantage does the exoskeleton of arthropods provide for locomotion?
|
it allows for changes in body position by muscles acting across joints
|
|
what body feature first allowed animals to move using muscles instead of cilia?
|
hydrostatic skeleton
|
|
which one of the following features also occurs (typically) in animals with a schizocoelous coelom?
|
blastopore becomes mouth
|
|
which occurs in diploblastic animals?
|
radial symmetry
|
|
humans have ________symmetry and _______ cleavage, with the blastpore becoming the _______. Since they have three tissue layers, they are called _____________.
|
radial, indeterminate, anus, tiploblastic
|
|
what term describes the evolutionary/developmental process by which the thorax and other specialized body regions arose in arthropods
|
tagmosis
|
|
of the three main groups of arthropods, which lacks mandibles?
|
chelicerata
|
|
what group of arthropods has two pairs of antennae?
|
crustacea
|
|
the ________pole of the embryo has the most yolk
|
vegetal
|
|
gastrualtion provides the blastula with _______and _________
|
archenteron, coelom
|
|
in an amniotic egg the ______stores waste allowing for a smaleer/larer size. The _________is for gas exchange.
|
allantois, chorion
|
|
T/F: in protostomes the anus evolves from the blastocoel
|
false
|
|
T/F: in pseudocoelomates the coelom develops from the blastocoel
|
true
|
|
T/F: torsion is a distinctive feature of bivalvia
|
false
|
|
T/F: during cleavage there is simultaneous mitosis with little growth
|
true
|
|
sponges (porifera)
|
no tissues, no gut
ecological: filter feeders, habitat for other animals, human: possible medicine, ecological |
|
Jellies (Ctenophora)
|
radial symmetry, cilia used to propel forward, 2 long tentacles to capture prey,
new evidence shows they diverged before sponges |
|
Cnidarians
|
true tissues, diploblastic, blind gut, radial symmetry, cnidocytes used to capture prey, intracellular and incomplete digestion,
|
|
cnidarians: 4 types?!
|
1. hydrozoa: Alternation of sexually-reproducing medusa stage with polyp stage that buds off medusae asexually
2.scyphozoa: jellyfish...main life stage is medusa, small polyp stage 3.cubozoa: box staged medusa stage 4. anthozoa: sea anemones...polyp stage only, 3. |
|
bilateria
|
triploblastic, allows greater muscles provides greater activity
|
|
platyhelminthes (flatworms)
|
blind gut and no coelomic activity, triploblastic, respiration by diffusion
trematoda (fllukes) |