Bio 1100 EXAM QUESTIONS WITH 100%
Verified Answers
\.Which of the following is the most inclusive term for an organism that obtains organic food
material by eating other organisms or substances derived from
them?
heterotroph
\.A graduate student finds an organism in a pond and thinks it is a freshwater sponge. A
postdoctoral student thinks it looks more like an aquatic fungus. How can they decide
whether it is an animal or a
fungus?
Look for cell walls under a microscope.
\.One of the characteristics unique to animals
is
gastrulation.
\.Both animals and fungi are heterotrophic. Which of the following distinguishes animal
heterotrophy from fungal
heterotrophy?
most animals derive their nutrition by ingesting materials
\.Which of the following characteristics is common to all known animals?
Animals are multicellular.
\.Which of the following inferences can best be made from the fact that arthropods colonized
land about 100 million years before vertebrates?
arthropods have had more time to coevolve with land plants than have vertebrates
\.Gastrulation is the process that directly forms the
__________.
germ layers
,\.An important trend in animal evolution was cephalization, or development of a "head". An
animal is said to show cephalization when it
__________.
has an aggregation of sensory structures at one end of the body
\.Which of the following animals does NOT have a body cavity?
flatworm
\.During embryological development, the anus forms before the mouth in _______
Chordates
\.The distinction between sponges and other animal phyla is based mainly on the absence
versus the presence
of
tissues.
\.Which tissue type or organ is correctly matched with its germ layer tissue?
skin-ectoderm
\.While observing seawater through a microscope, you spot the embryo of an unknown
animal. Which of the following criteria could you use to determine whether the organism
exhibits protostome or deuterostome
development?
spiral cleavage or radial cleavage
\.Which of the following is a feature of the digestive tube in most animal phyla?
The mouth and anus form the ends of the inner tube.
\.In examining an unknown animal species during its embryonic development, how can you
be sure what you are looking at exhibits protostome or deuterostome
development?
The animal's coelom develops from the archenteron.
\.If an organism exhibits a head with sensory structures, which of the following characteristics
would it likely also
exhibit?
it is bilaterally symmetrical
, \.Suppose a researcher for a pest-control company developed a chemical that inhibited the
development of an embryonic mosquito's endodermal cells. Which of the following best
explains the effectiveness of the
pesticide?
The mosquito would have trouble digesting food, due to impaired gut function.
\.Which of the following statements is correct regarding animal body plans?
the body plans we see now have been evolutionarily advantageous compared to others in the
past
\.Nine-banded armadillos give birth to four genetically identical offspring at a time. What
does this fact suggest about the development of these
organisms?
the embryo undergoes radial and indeterminate cleavage
\.What is the key difference between a coelom and a
pseudocoelom?
Only a coelom is fully lined with mesoderm tissue.
\.Which of the following statements is
correct?
All animals share a common ancestor.
\.You find a new species of worm and want to classify it. Which of the following lines of
evidence would allow you to classify the worm as a nematode and not an
annelid?
It sheds its external skeleton to grow
\.At one time, sponges were lumped into one phylum. Then, they were separated into several
different phyla. Now, they are considered one phylum again. These changes indicate which of
the
following?
Every phylogeny should be considered a hypothesis that must be revised in the light of new
data.
\.Due to the decreasing numbers of insects, which of the following is most likely?
Both terrestrial and aquatic food webs will be impacted.
Verified Answers
\.Which of the following is the most inclusive term for an organism that obtains organic food
material by eating other organisms or substances derived from
them?
heterotroph
\.A graduate student finds an organism in a pond and thinks it is a freshwater sponge. A
postdoctoral student thinks it looks more like an aquatic fungus. How can they decide
whether it is an animal or a
fungus?
Look for cell walls under a microscope.
\.One of the characteristics unique to animals
is
gastrulation.
\.Both animals and fungi are heterotrophic. Which of the following distinguishes animal
heterotrophy from fungal
heterotrophy?
most animals derive their nutrition by ingesting materials
\.Which of the following characteristics is common to all known animals?
Animals are multicellular.
\.Which of the following inferences can best be made from the fact that arthropods colonized
land about 100 million years before vertebrates?
arthropods have had more time to coevolve with land plants than have vertebrates
\.Gastrulation is the process that directly forms the
__________.
germ layers
,\.An important trend in animal evolution was cephalization, or development of a "head". An
animal is said to show cephalization when it
__________.
has an aggregation of sensory structures at one end of the body
\.Which of the following animals does NOT have a body cavity?
flatworm
\.During embryological development, the anus forms before the mouth in _______
Chordates
\.The distinction between sponges and other animal phyla is based mainly on the absence
versus the presence
of
tissues.
\.Which tissue type or organ is correctly matched with its germ layer tissue?
skin-ectoderm
\.While observing seawater through a microscope, you spot the embryo of an unknown
animal. Which of the following criteria could you use to determine whether the organism
exhibits protostome or deuterostome
development?
spiral cleavage or radial cleavage
\.Which of the following is a feature of the digestive tube in most animal phyla?
The mouth and anus form the ends of the inner tube.
\.In examining an unknown animal species during its embryonic development, how can you
be sure what you are looking at exhibits protostome or deuterostome
development?
The animal's coelom develops from the archenteron.
\.If an organism exhibits a head with sensory structures, which of the following characteristics
would it likely also
exhibit?
it is bilaterally symmetrical
, \.Suppose a researcher for a pest-control company developed a chemical that inhibited the
development of an embryonic mosquito's endodermal cells. Which of the following best
explains the effectiveness of the
pesticide?
The mosquito would have trouble digesting food, due to impaired gut function.
\.Which of the following statements is correct regarding animal body plans?
the body plans we see now have been evolutionarily advantageous compared to others in the
past
\.Nine-banded armadillos give birth to four genetically identical offspring at a time. What
does this fact suggest about the development of these
organisms?
the embryo undergoes radial and indeterminate cleavage
\.What is the key difference between a coelom and a
pseudocoelom?
Only a coelom is fully lined with mesoderm tissue.
\.Which of the following statements is
correct?
All animals share a common ancestor.
\.You find a new species of worm and want to classify it. Which of the following lines of
evidence would allow you to classify the worm as a nematode and not an
annelid?
It sheds its external skeleton to grow
\.At one time, sponges were lumped into one phylum. Then, they were separated into several
different phyla. Now, they are considered one phylum again. These changes indicate which of
the
following?
Every phylogeny should be considered a hypothesis that must be revised in the light of new
data.
\.Due to the decreasing numbers of insects, which of the following is most likely?
Both terrestrial and aquatic food webs will be impacted.
