BIO200 FINAL EXAM QUESTIONS AND ANSWERS REAL EXAM
QUESTIONS
What is dioecious? - ANSWER: Sexual reproduction where there are separate male
and female organs
What is a gemmule? - ANSWER: A tough coated cluster of cells produced by
freshwater sponges
Acronology - ANSWER: Research area with field of zoology that refers to the study of
mites and ticks; could involve disease transmission, taxonomy, physiology, etc.
Spirical - ANSWER: Rigid sponge skeletal structure made of silica or calcium
carbonate to support the body wall; they often triradiate in shape
Nematocysts - ANSWER: Stinging structures found in all cnidarians; the hollow,
spear-like tip introduces venom into prey
Ectoderm - ANSWER: Primary germ layer forms during the gastrula stage; it forms
the muscles, blood, skeletal and reproductive system in the embryo
control group - ANSWER: The group in a research project that is given the placebo
test or treatment; it is used for comparison with the experimental group
envagination - ANSWER: The opening into the gastrula cleavage stage causes
significant development of the embryo
Blastula - ANSWER: The cleavage stage of development consists of a hollow mass of
blastomeres; the light-colored center if filled with fluid, pushing blastomeres to the
periphery
Blastomere - ANSWER: Type of development where blastomere action is determined
in late cleavage; if one blastomere is removed, normal, healthy larvae are produced
Function of the velarium found in box jellies - ANSWER: Reinforces the edge of the
bell, to prevent the body from tearing and fraying in the ocean
Scyphistoma - ANSWER: Sessile feeding stage of Aurelia is a growing polyp
What is the typical function of a cnidarian larval stage?? - ANSWER: Functions to
swim and disperse to other areas of the ocean
Mesoglea, a jelly like material made from the cells of endoderm and ectoderm, is
found in ? - ANSWER: Cnidarians
, Structure that creates a water current to pull oxygen and food inside coral and
anemones: - ANSWER: Siphonoglyph
Which of the following is true concerning the strobila stage of Aurelia - ANSWER: It
produces stacks of immature jellyfish that swim away from adults
Which is true regarding polyps in cnidarians - ANSWER: Polyps are cylindrical and
have tentacles near the oral end
Which has radial symmetry? - ANSWER: Jellyfish
The medusa stage of the life cycle is missing in - ANSWER: Corals
Concept formulated by N. Eldridge and S.J. Gould to describe why fossil records may
not contain all of the intermediate forms that were produced - ANSWER: Punctuated
Equilibrium
Many cnidarians have this sensory structure around the margin of the bell -
ANSWER: Rhopalium
On the outer surface of sponges, these cells regulate the size of the ostia - ANSWER:
Pinacocytes
Sponge body plan is smallest and least complex; no internal branching - ANSWER:
Ascon
Cells responsible for forming the skeletal structures inside a sponge - ANSWER:
Archaeocytes
True charteristic of a sponge - ANSWER: Lacks a nervous system
Which is true concerning the mesohyl in sponges - ANSWER: middle layer of the
sponge body wall thin and gelatinous
This collagen protein is fibrous and flexible; it forms the substance of the body wall
in sponges; it remains in bath sponges when the skeletal parts are broken and
removed - ANSWER: Spongin
Cells responsible for forming the egg-like cells in sponges - ANSWER: Archaeocytes
Scientists who stated that humans populations are kept in check or limited by famine
and disease. - ANSWER: T. Malthus
Charles Darwin wrote in both his journals that because of natural selection -
ANSWER: individuals whose traits give them a survival advantage in a particular
environment are more likely to pass their traits on to the next generation
QUESTIONS
What is dioecious? - ANSWER: Sexual reproduction where there are separate male
and female organs
What is a gemmule? - ANSWER: A tough coated cluster of cells produced by
freshwater sponges
Acronology - ANSWER: Research area with field of zoology that refers to the study of
mites and ticks; could involve disease transmission, taxonomy, physiology, etc.
Spirical - ANSWER: Rigid sponge skeletal structure made of silica or calcium
carbonate to support the body wall; they often triradiate in shape
Nematocysts - ANSWER: Stinging structures found in all cnidarians; the hollow,
spear-like tip introduces venom into prey
Ectoderm - ANSWER: Primary germ layer forms during the gastrula stage; it forms
the muscles, blood, skeletal and reproductive system in the embryo
control group - ANSWER: The group in a research project that is given the placebo
test or treatment; it is used for comparison with the experimental group
envagination - ANSWER: The opening into the gastrula cleavage stage causes
significant development of the embryo
Blastula - ANSWER: The cleavage stage of development consists of a hollow mass of
blastomeres; the light-colored center if filled with fluid, pushing blastomeres to the
periphery
Blastomere - ANSWER: Type of development where blastomere action is determined
in late cleavage; if one blastomere is removed, normal, healthy larvae are produced
Function of the velarium found in box jellies - ANSWER: Reinforces the edge of the
bell, to prevent the body from tearing and fraying in the ocean
Scyphistoma - ANSWER: Sessile feeding stage of Aurelia is a growing polyp
What is the typical function of a cnidarian larval stage?? - ANSWER: Functions to
swim and disperse to other areas of the ocean
Mesoglea, a jelly like material made from the cells of endoderm and ectoderm, is
found in ? - ANSWER: Cnidarians
, Structure that creates a water current to pull oxygen and food inside coral and
anemones: - ANSWER: Siphonoglyph
Which of the following is true concerning the strobila stage of Aurelia - ANSWER: It
produces stacks of immature jellyfish that swim away from adults
Which is true regarding polyps in cnidarians - ANSWER: Polyps are cylindrical and
have tentacles near the oral end
Which has radial symmetry? - ANSWER: Jellyfish
The medusa stage of the life cycle is missing in - ANSWER: Corals
Concept formulated by N. Eldridge and S.J. Gould to describe why fossil records may
not contain all of the intermediate forms that were produced - ANSWER: Punctuated
Equilibrium
Many cnidarians have this sensory structure around the margin of the bell -
ANSWER: Rhopalium
On the outer surface of sponges, these cells regulate the size of the ostia - ANSWER:
Pinacocytes
Sponge body plan is smallest and least complex; no internal branching - ANSWER:
Ascon
Cells responsible for forming the skeletal structures inside a sponge - ANSWER:
Archaeocytes
True charteristic of a sponge - ANSWER: Lacks a nervous system
Which is true concerning the mesohyl in sponges - ANSWER: middle layer of the
sponge body wall thin and gelatinous
This collagen protein is fibrous and flexible; it forms the substance of the body wall
in sponges; it remains in bath sponges when the skeletal parts are broken and
removed - ANSWER: Spongin
Cells responsible for forming the egg-like cells in sponges - ANSWER: Archaeocytes
Scientists who stated that humans populations are kept in check or limited by famine
and disease. - ANSWER: T. Malthus
Charles Darwin wrote in both his journals that because of natural selection -
ANSWER: individuals whose traits give them a survival advantage in a particular
environment are more likely to pass their traits on to the next generation
