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Organismic Biology Midterm
Terms in this set (36)
It is relatively safe to say that our closest evolutionary relative is
which of the following is not possible
during embryonic development, unique cell layers develop and distinguish during a stage called
the gastrula stage
For excretion, flatworms use:
which of the following is the characteristic of the sponges
Sexually most flatworms are
the outer covering and nervous systems of eumetazoans develop from the
a cnidocyte is a specialized cell used for
the last common ancestor of all animals was probably a
the cavity inside the blastula is called the
a ___________ is a body cavity derived from the mesoderm and endoderm
What do all deuterostomes have in common?
The pore (blastopore) formed during gastrulation becomes the anus.
the bilaterians are divided into three clades
Deuterostomia, Ecdysozoa, and Lophotrochozoa
the Cambrian explosion happened during when
which of the following is not a general characteristic of anthropoids
they have a closed circulatory system
which of the following phylum and description is incorrect
Porifera- gastrovascular activity and coelomate
which of these mollusk groups can be classified as suspension feeders
which characteristic is shared by cnidarians and flatworms
a digestive system with a simple opening
Nematodes and arthropods both _____.
grow by shedding their exoskeleton
in the _________the notochord persisted in adults
what is believed to be the most significant result of the evolutions of the amniotic egg
tetrapods were no longer tied to the water for reproduction
which of these is amniotes
which of the following is a characteristic of all chordates at some point during their life cycle
post anal tail
If a tunicate's pharyngeal slits were suddenly blocked, the animal would have trouble_______.
respiring and feeding
vertebrates and tunicates share
a notochrod and a dorsal, hollow nerve cord
Fossils of the earliest tetrapods should _____.
indicate limited adaptation to life on land
Comb jellies may not be the most familiar animal to you, but they are critical in the food chain because they make up a significant portion of the planktonic biomass. Their feeding strategy is predatory and involves adhesives or mucus on their tentacles or other body parts. What feeding tactic do these animals use?
You find what you believe is a new species of animal. Which of the following characteristics would enable you to argue that it is more closely related to a flatworm than it is to a roundworm?
it has a mouth and an anus
If a lung were to be found in a mollusc, where would it be located?
undergo complete metamorphose
Have jointed appendages
have segmented bodies
have an exoskeleton or cuticle
a terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange, and modified segmentation. A knowledgable zoologist should predict that the adults of this species would also feature
open circulatory system
The water vascular system of echinoderms
functions in locomotion and feeding
which of the following are unique to animals
nervous conduction and muscular movement
Among protostomes, which morphological trait has shown the most variation?
type of body cavity
while looking at some seawater through your microscope, you spot the egg of an unknown animal. which of the following tests could you use to determine whether the developing organism is a protostome or a deuterostome. see whether the embryo
exhibits spiral cleavage or radial cleavage
an organism that exhibits cephalization probably also
is bilaterally symmetrical
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