Zoology: Exam 2
Which body plan has the body cavity between the mesoderm and the endoderm? - Answer-
pseudocoelomate
____________ have radial cleavage, while _________ have spiral cleavage. - Answer-deuterostomes,
protostomes
___________ embryos are indeterminate, while __________ are determinate. - Answer-Deuterostomes,
protostomes
The only level of animal to lack true tissues are those within the phylum ________. - Answer-Porifera
Larval sponges are _____ __________. - Answer-free swimming
_________ fibers provide shape for the phylum porifera. - Answer-Spongin
Needle-like ________ protect the sponge from animals. - Answer-Spicules
The sponges have a vase-like shape that contain ____________, protist-like cells that help the organism
circulate water and filter feed. - Answer-choanocytes
What are the only animals that can reassemble their cells if seperated? - Answer-Sponges
, How does sexual reproduction happen in the sponges? - Answer-Choanocytes transform into sperm that
are, then, released into the water.
What distinguishes the Cnidaria from all other invertebrates? - Answer-They are diploblastic.
Cnidarians contain tissues but no _______. - Answer-organs
The layers of the cnidarians are the outer layer, the __________ that provides ________, and the inner
layer, the ______________ ________. - Answer-epidermis, protection, gastrovascular cavity
In general, species having both polyp and medusa forms, the ________ forms gametes. - Answer-
medusa
The metamorphosis of a Cnidarian: Egg -> _________ ______ -> _____ attaches, ______ is formed ->
__________ formed from grown _______ - Answer-Planula larva, larva, polyp, medusae, polyp
A major evolutionary innovation in cnidarians is ___________ ________ of food inside the animal -
Answer-extracellular digestion
_________ are specialized cells that contain coiled organelles called a ________. - Answer-cnidocyte,
nematocyst
The anenomes and corals are a part of the class _________; the jellyfish are part of the class
__________; the hydra and man-of-war are part of the class __________. - Answer-Anthozoa,
Scyphozoa, Hydrozoa
The only class of cnidarians with freshwater members is the Class ________. - Answer-Hydrozoa
The _______ ___ of the hydras allow the organism to respond to the environment. - Answer-nerve net
Which body plan has the body cavity between the mesoderm and the endoderm? - Answer-
pseudocoelomate
____________ have radial cleavage, while _________ have spiral cleavage. - Answer-deuterostomes,
protostomes
___________ embryos are indeterminate, while __________ are determinate. - Answer-Deuterostomes,
protostomes
The only level of animal to lack true tissues are those within the phylum ________. - Answer-Porifera
Larval sponges are _____ __________. - Answer-free swimming
_________ fibers provide shape for the phylum porifera. - Answer-Spongin
Needle-like ________ protect the sponge from animals. - Answer-Spicules
The sponges have a vase-like shape that contain ____________, protist-like cells that help the organism
circulate water and filter feed. - Answer-choanocytes
What are the only animals that can reassemble their cells if seperated? - Answer-Sponges
, How does sexual reproduction happen in the sponges? - Answer-Choanocytes transform into sperm that
are, then, released into the water.
What distinguishes the Cnidaria from all other invertebrates? - Answer-They are diploblastic.
Cnidarians contain tissues but no _______. - Answer-organs
The layers of the cnidarians are the outer layer, the __________ that provides ________, and the inner
layer, the ______________ ________. - Answer-epidermis, protection, gastrovascular cavity
In general, species having both polyp and medusa forms, the ________ forms gametes. - Answer-
medusa
The metamorphosis of a Cnidarian: Egg -> _________ ______ -> _____ attaches, ______ is formed ->
__________ formed from grown _______ - Answer-Planula larva, larva, polyp, medusae, polyp
A major evolutionary innovation in cnidarians is ___________ ________ of food inside the animal -
Answer-extracellular digestion
_________ are specialized cells that contain coiled organelles called a ________. - Answer-cnidocyte,
nematocyst
The anenomes and corals are a part of the class _________; the jellyfish are part of the class
__________; the hydra and man-of-war are part of the class __________. - Answer-Anthozoa,
Scyphozoa, Hydrozoa
The only class of cnidarians with freshwater members is the Class ________. - Answer-Hydrozoa
The _______ ___ of the hydras allow the organism to respond to the environment. - Answer-nerve net
