Rio Bio 202 Exam 3 Complete Questions
with Correct Detailed Answers ||
Already Graded A+
<RECENT VERSION>
1.Which is NOT typically used to classify animals? - ANSWER ✔ --All answers
are ways scientist classify animals
Genetic data
Location of mouth and anus during embryonic development
Symmetry of the animal
Presence and absence of tissues
2. Animal life began about 600 billion years ago. - ANSWER ✔ false (million)
3. Spermatogenesis occurs when a [______________] which is [_______] goes
through a series of meiotic divisions to eventually form four
[__________________] which are [______________]. - ANSWER ✔
Spermatogonium, diploid, spermatids, haploid
4. Mammals, sponges, echinoderms and cnidarians have a ____________ amount
of yolk located ________________ the egg. - ANSWER ✔ little, evenly
throughout
5. Polyspermy is when more than one sperm fertilizes an egg and results in healthy
twins. - ANSWER ✔ false
6. An embryo is divided into two poles called: - ANSWER ✔ animal and vegetal
pole
,7. During cleavage the cell membrane divides the cell into two cells, the extent to
which cleavage can bisect the cell is either ___________________ meaning
cleavage furrows the egg completely or ____________________ where cleavage
furrows the egg partially. - ANSWER ✔ holoblastic, meroblastic
8. Animals, such as flatworms and earthworms, have spiral cleavage where the
blastomeres are arranged on top of the other. - ANSWER ✔ false (spiral shaped)
9. If you removed a blastomere from a developing sea urchin (echinoderm) that
exhibits radial cleavage, that blastomere could form a healthy larva. - ANSWER ✔
true
10. The _______________ is an embryo that has divided into many, many cells
that have migrated to the periphery and formed a fluid-filled cavity called the
__________________. - ANSWER ✔ blastula, blastocoel
11. In embryonic drawings colors are standardized, so that the ectoderm is always
____________, the mesoderm ___________, and the endoderm ______________.
- ANSWER ✔ blue, red, yellow
12. In gastrulation of diploblastic animals, the internal pouch lined with endoderm
is called the ___________________. - ANSWER ✔ archenteron
13. Jellyfish, sea anemones, and corals are all examples of diploblastic animals. -
ANSWER ✔ true
14. Which is NOT true about deuterostomes. - ANSWER ✔ --They undergo radial
cleavage and have determinate development.
The mouth is newly formed.
All of the answers are true about deuterostomes.
The coelom is formed through enterocoely.
Echinoderms and chordates are examples.
15. In protostomes, the mesoderm fills the blastocoel in the ________________
body plan plan. - ANSWER ✔ Acoelomate
16. The ectoderm only lines one side of the blastocoel in pseudocoelomates. -
ANSWER ✔ false (surrounds)
,17. Which answer is NOT true about why the evolution of the coelom in animals is
- ANSWER ✔ It exposes more cells to surface exchange.
Provides space for organs
--All answers are correct.
Provides a hydrostatic skeleton for movement
Allows greater flexibility
18. Organogenesis is the differentiation of two embryonic layers (diploblastic) into
tissues and organs. - ANSWER ✔ false (three)
19. Which of the following does the mesoderm NOT give rise to? - ANSWER ✔ --
Skin cells
Cardiac muscle
Skeletal muscle cells
Smooth muscle
Red blood cells
20. Despite structural and functional evolution, new forms are often constrained by
the architecture of their ancestors. - ANSWER ✔ true
21. An aggregation of similar cells into layers to perform a common function is
a(n) __________. - ANSWER ✔ tissue
22. Animals that have tissue level of organization are broadly called
____________. - ANSWER ✔ Eumetazoans
23. The only animal group discussed in this course that do not contain germ layers
and therefore no tissues or organs are the _____________. - ANSWER ✔ Sponges
24. _____________________ are composed of relatively few cells, many
extracellular fibers and a matrix for binding and supportive functions. - ANSWER
✔ Connective Tissues
25. Sponges have radial symmetry. - ANSWER ✔ false
26. Which is NOT an advantage of bilateral symmetry? - ANSWER ✔ Allows the
mouth to be positioned in the head to procure food
, --Allows the animal to interact with the environment from all sides.
Allows for cephalization
Allows for efficient positioning of the sense organs
Allows for directional forward movement
27. Two major groups in deuterostomes are Ecdysozoan and Lophotrochozoa. -
ANSWER ✔ false
28. The mesoderm fills the blastocoel in which type of animal? - ANSWER ✔
Acoelomate
29. Segments that form in the embryonic stage of an animal is called the
________________, while as an adult it is often referred to as a
____________________. - ANSWER ✔ Somite, metamere
30. When ramets are within a colony but have different functions it is called
colonial polymorphism. - ANSWER ✔ true
31. Which is NOT an advantage of modular/colonial animals? - ANSWER ✔
Asexual reproduction
Undetermined growth
Biological parameters independent of age
--Short life spans
Regeneration
32. Endotherms want to maximize their surface area/volume ratio. - ANSWER ✔
false
33. In order for an animal to provide enough respiratory gas exchange and
nutrients to the its entire body, animals have evolved: - ANSWER ✔ internal
transport system to take nutrients and gases between cells and external
environment.
a body plan with a high surface area to volume ratio
flatten shape so no internal spaces is far from the surface
folds or invaginations in the body surface
--all of the answers are correct
34. The water enters the sponge through the osculum. - ANSWER ✔ false, ostia
with Correct Detailed Answers ||
Already Graded A+
<RECENT VERSION>
1.Which is NOT typically used to classify animals? - ANSWER ✔ --All answers
are ways scientist classify animals
Genetic data
Location of mouth and anus during embryonic development
Symmetry of the animal
Presence and absence of tissues
2. Animal life began about 600 billion years ago. - ANSWER ✔ false (million)
3. Spermatogenesis occurs when a [______________] which is [_______] goes
through a series of meiotic divisions to eventually form four
[__________________] which are [______________]. - ANSWER ✔
Spermatogonium, diploid, spermatids, haploid
4. Mammals, sponges, echinoderms and cnidarians have a ____________ amount
of yolk located ________________ the egg. - ANSWER ✔ little, evenly
throughout
5. Polyspermy is when more than one sperm fertilizes an egg and results in healthy
twins. - ANSWER ✔ false
6. An embryo is divided into two poles called: - ANSWER ✔ animal and vegetal
pole
,7. During cleavage the cell membrane divides the cell into two cells, the extent to
which cleavage can bisect the cell is either ___________________ meaning
cleavage furrows the egg completely or ____________________ where cleavage
furrows the egg partially. - ANSWER ✔ holoblastic, meroblastic
8. Animals, such as flatworms and earthworms, have spiral cleavage where the
blastomeres are arranged on top of the other. - ANSWER ✔ false (spiral shaped)
9. If you removed a blastomere from a developing sea urchin (echinoderm) that
exhibits radial cleavage, that blastomere could form a healthy larva. - ANSWER ✔
true
10. The _______________ is an embryo that has divided into many, many cells
that have migrated to the periphery and formed a fluid-filled cavity called the
__________________. - ANSWER ✔ blastula, blastocoel
11. In embryonic drawings colors are standardized, so that the ectoderm is always
____________, the mesoderm ___________, and the endoderm ______________.
- ANSWER ✔ blue, red, yellow
12. In gastrulation of diploblastic animals, the internal pouch lined with endoderm
is called the ___________________. - ANSWER ✔ archenteron
13. Jellyfish, sea anemones, and corals are all examples of diploblastic animals. -
ANSWER ✔ true
14. Which is NOT true about deuterostomes. - ANSWER ✔ --They undergo radial
cleavage and have determinate development.
The mouth is newly formed.
All of the answers are true about deuterostomes.
The coelom is formed through enterocoely.
Echinoderms and chordates are examples.
15. In protostomes, the mesoderm fills the blastocoel in the ________________
body plan plan. - ANSWER ✔ Acoelomate
16. The ectoderm only lines one side of the blastocoel in pseudocoelomates. -
ANSWER ✔ false (surrounds)
,17. Which answer is NOT true about why the evolution of the coelom in animals is
- ANSWER ✔ It exposes more cells to surface exchange.
Provides space for organs
--All answers are correct.
Provides a hydrostatic skeleton for movement
Allows greater flexibility
18. Organogenesis is the differentiation of two embryonic layers (diploblastic) into
tissues and organs. - ANSWER ✔ false (three)
19. Which of the following does the mesoderm NOT give rise to? - ANSWER ✔ --
Skin cells
Cardiac muscle
Skeletal muscle cells
Smooth muscle
Red blood cells
20. Despite structural and functional evolution, new forms are often constrained by
the architecture of their ancestors. - ANSWER ✔ true
21. An aggregation of similar cells into layers to perform a common function is
a(n) __________. - ANSWER ✔ tissue
22. Animals that have tissue level of organization are broadly called
____________. - ANSWER ✔ Eumetazoans
23. The only animal group discussed in this course that do not contain germ layers
and therefore no tissues or organs are the _____________. - ANSWER ✔ Sponges
24. _____________________ are composed of relatively few cells, many
extracellular fibers and a matrix for binding and supportive functions. - ANSWER
✔ Connective Tissues
25. Sponges have radial symmetry. - ANSWER ✔ false
26. Which is NOT an advantage of bilateral symmetry? - ANSWER ✔ Allows the
mouth to be positioned in the head to procure food
, --Allows the animal to interact with the environment from all sides.
Allows for cephalization
Allows for efficient positioning of the sense organs
Allows for directional forward movement
27. Two major groups in deuterostomes are Ecdysozoan and Lophotrochozoa. -
ANSWER ✔ false
28. The mesoderm fills the blastocoel in which type of animal? - ANSWER ✔
Acoelomate
29. Segments that form in the embryonic stage of an animal is called the
________________, while as an adult it is often referred to as a
____________________. - ANSWER ✔ Somite, metamere
30. When ramets are within a colony but have different functions it is called
colonial polymorphism. - ANSWER ✔ true
31. Which is NOT an advantage of modular/colonial animals? - ANSWER ✔
Asexual reproduction
Undetermined growth
Biological parameters independent of age
--Short life spans
Regeneration
32. Endotherms want to maximize their surface area/volume ratio. - ANSWER ✔
false
33. In order for an animal to provide enough respiratory gas exchange and
nutrients to the its entire body, animals have evolved: - ANSWER ✔ internal
transport system to take nutrients and gases between cells and external
environment.
a body plan with a high surface area to volume ratio
flatten shape so no internal spaces is far from the surface
folds or invaginations in the body surface
--all of the answers are correct
34. The water enters the sponge through the osculum. - ANSWER ✔ false, ostia
