Download In animal embryos, the ectoderm gives rise to ______.

In animal embryos, the ectoderm
gives rise to ________.
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muscle
the inner lining of the
gut and associated
organs
the nervous system and
outer portion of the
epidermis
internal organs
skeleton
3.
4.
5.
1
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Bilateral symmetry means an
animal has ________.
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cephalization, or a distinct head
with sensory organs
body parts organized
symmetrically around a main
axis, like spokes of a wheel
equivalent right and left halves
equivalent top and bottom
halves
polarity, or a front-to-back axis,
with a leading and trailing end
2.
3.
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Some freshwater sponges produce
gemmules, which function to ________.
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draw food-laden water into
the body
phagocytize microscopic
food particles
process food particles and
distribute them to other cells
produce ova for sexual
reproduction
reproduce the sponge
asexually during periods of
stressful conditions
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3.
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Identify the false statement
about cnidarians.
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anthozoans include sea
anemones and sea fans
scyphozoans include reef building corals
cnidarians have two tissue
layers but no internal organs
cnidarians have a nerve net that
controls contractile filaments
in some species of cnidarians,
sessile polyps can produce
motile medusae
2.
3.
4.
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A nematocyst is ________.
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a stinging capsule at the free
end of an epidermal cell that
contains a barbed thread
a tentacle of a medusazoan
such as the Portuguese man-ofwar
the larval stage of sexually
reproducing medusae
one of the reproductive polyps of
a colonial hydroid
the hydrostatic skeleton of a
cnidarian
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3.
4.
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The blood fluke Schistosoma
japonicum ________.
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completes all stages of its life
cycle in the human
uses the human as an
intermediate host
requires the presence of an
aquatic snail as a definitive host
is transmitted to people who eat
undercooked, infected pork,
beef, or fish
infect their human hosts by
boring into their skin as humans
wade in infested waters
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The nephridia of an earthworm
are ________.
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primitive kidneys that control the
composition and volume of the
coelomic fluids
longitudinal muscles that
shorten and thicken the worm to
anchor it in the soil
nerve cords that run the length
of the body
bristles used in locomotion
body segments, each with its
own muscles, nerves, and blood
vessels
2.
3.
4.
5.
1
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Rotifers acquire food by
________.
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absorbing their host's
predigested fluids through the
body wall
using rotating ciliated lobes to
create a vortex in the water and
pull in prey
the use of stinging cells which
fire barbed hooks at prey when
triggered
eating soil and digesting the
microbes within it
breaking down leaf litter and
other detritus
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Mollusks do not include
________.
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chitons
nudibranchs
clams
octopus
rotifers
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A living descendent of the Ordovician
nautiloids is the ________.
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1.
2.
3.
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octopus
squid
oyster
chambered
nautilus
5. sea snail
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Elephantiasis is due to
________.
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adult Wuchereria bancrofti becoming
lodged in lymph nodes, blocking
them and causing severe edema
infection of the intestinal
roundworms Ascaris lumbricoides
causing abdominal pain and
vomiting
the pinworm Enterobius vermicularis
causing anal itching
juvenile hookworms cutting their way
through human skin and traveling in
blood to the lungs
adult Trichinella spiralis attached to
the intestinal lining
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Identify the trait that is not
characteristic of arthropods.
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1. bilateral symmetry
2. closed circulatory
system
3. segmentation
4. reduced coelom
5. complete gut
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Select the true statement
regarding spiders.
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approximately twenty-five thousand
kinds of spiders bite humans and
other animals when threatened
the spider's segments are fused into
three sections: the forebody, the
abdomen, and the hindbody
spiders have a closed circulatory
system with a heart which pumps
blood into tissues and back to book
lungs for oxygenation
spiders do not have a distinct brain,
but rather ganglia that control
localized reflexes
none of the choices
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Goose barnacles, which are filter feeders
with hinged clam-like shells, are most
closely related to ________.
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cephalopods
mollusks
crustaceans
cnidarians
chelicerates
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1
2
5
Identify the false statement
about millipedes.
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they have two pairs of walking
legs per segment
their main food items are
insects, earthworms, and snails
they have a more cylindrical
body than centipedes, which are
somewhat flattened
they do not really have a
thousand legs
as a millipede develops, certain
pairs of its segments fuse
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Complete metamorphosis in
insects means that ________.
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the young hatch from eggs as pupae,
grow, then become larvae and finally
adults
the young hatch from eggs and live as
herbivores until they undergo
metamorphosis and become
carnivorous adults
eggs hatch into nymphs which grow
larger and mature into adults
eggs hatch into small larvae, which
grow and become pupae before finally
undergoing metamorphosis into adults
the young hatch from eggs and live as
carnivores until they undergo
metamorphosis and become
herbivorous adults
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A bite that ulcerates skin and heals slowly is
characteristic of the ________.
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black widow
(Latrodectus)
deer tick (Ixodes)
brown recluse
(Loxosceles reclusa)
bark scorpion
(Centruroides
sculpturatus)
centipede (Scutigera)
2.
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Diabrotica virgifera is ________.
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an African mosquito that
transmits dengue fever
a tick from Northeastern
deciduous forests that transmits
Lyme disease
the most feared species of
scorpion in the United States,
with a potentially fatal sting
a corn rootworm responsible for
a billion dollars a year in crop
losses
the poisonous brown recluse
spider
2.
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Identify the animals that are not
deuterostomes.
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echinoderms
arthropods
tunicates
lancelets
lampreys
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Most echinoderms are
________.
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1. radial with bilateral
larvae
2. bilateral with radial
larvae
3. protostomes
4. bottom-dwelling
freshwater species
5. none of the choices
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