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BIOL 1104 quiz #3 study questions with complete solutions
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BIOL 1104 quiz #3 study questions with complete solutionsAn animals with a mouth and anus, also bilaterally symmetrical:
can you predict the phylum of this animal? Correct Answer No,
you would have to find out if it was a protostome or a
deuterostome.
An animals with a mouth and anus: Can you accurately predict
the symmetry of the animal? Correct Answer yes, all animals
with a complete GI tract are bilaterally symmetrical at least one
point in their lifetime.
Are mammals amniotes? Correct Answer Yes, embryo
develops inside the mother's body. (amniotic sac)
Are reptiles amniotes? Correct Answer Yes, embryo develops
in an amniotic egg.
Asymmetry Correct Answer cannot be separated into equal
parts
bilateral symmetry Correct Answer can be split into 2 'sides'
only along one plane
blastopore Correct Answer dimple in the blastoderm, beginning
of intestinal tract
Blastula Correct Answer hollow ball of cells
Cnidarians push out a stinger from their cnidocytes (stinging
cells) when water rapidly enters a part of the cell called the
, cnidoblast. Would you expect a cnidoblast to have higher or
lower solute concentrations than the rest of the cell when water
begins to enter the cnidoblast? Justify your response. You may
want to return to lectures on plants to review how osmosis
works. Correct Answer They have a higher amount of solute
which causes water to rush in, to balance out the solutes.
Compare and contrast open and closed circulatory systems.
Correct Answer Closed Circulatory system: blood is fully
contained within vessels.
Open circulatory system: marinating, blood partially contained
in vessels; blood mixes with extracellular fluid.
Define ectotherm. Correct Answer unable to generate body
heat, cold blooded
Define endotherm. Correct Answer can generate body heat,
warm blooded
Define heterothermy. Correct Answer the body temperature
matches the environment.
Define homeotherm. Correct Answer can maintain stable body
temperature when the environmental temperature changes.
Define negative feedback and give example. Correct Answer
Regulate or conform to the changes, trying to resist change.
ex. when you are hungry you want to resist that hunger by eating
something.
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