Bio 3 Exam 2 Practice questions &
answers rated A+
Which of the following is (are) unique to animals?
A) cells that have mitochondria
B) the structural carbohydrate, chitin
C) nervous conduction and muscular movement
D) heterotrophy
E) Two of these responses are correct. - correct answer ✔✔ C) nervous conduction and
muscular movement
What do animals as diverse as corals and monkeys have in common? - correct answer ✔✔
presence of Hox genes
The Hox genes came to regulate each of the following in what sequence, from earliest to most
recent?
1. identity and position of paired appendages in protostome embryos
2. anterior-posterior orientation of segments in protostome embryos
3. positioning of tentacles in cnidarians
4. anterior-posterior orientation in vertebrate embryos - correct answer ✔✔ 3 → 2 → 1 → 4
The last common ancestor of all animals was probably a - correct answer ✔✔ flagellated protist.
What is the probable sequence in which the following clades of animals originated, from
earliest to most recent?
, 1. tetrapods
2. vertebrates
3. deuterostomes
4. amniotes
5. bilaterians - correct answer ✔✔ 5 → 3 → 2 → 1 → 4
Arthropods invaded land about 100 million years before vertebrates did so. This most clearly
implies that - correct answer ✔✔ arthropods have had more time to coevolve with land plants
than have vertebrates.
An adult animal that possesses bilateral symmetry is most certainly also - correct answer ✔✔
triploblastic
At which developmental stage should one be able to first distinguish a diploblastic embryo from
a triploblastic embryo? - correct answer ✔✔ gastrulation
What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates -
correct answer ✔✔ have a body cavity completely lined by mesodermal tissue, whereas
pseudocoelomates do not.
You have before you a living organism, which you examine carefully. Which of the following
should convince you that the organism is acoelomate? - correct answer ✔✔ Muscular activity of
its digestive system distorts the body wall.
The blastopore is a structure that first becomes evident during - correct answer ✔✔
gastrulation
answers rated A+
Which of the following is (are) unique to animals?
A) cells that have mitochondria
B) the structural carbohydrate, chitin
C) nervous conduction and muscular movement
D) heterotrophy
E) Two of these responses are correct. - correct answer ✔✔ C) nervous conduction and
muscular movement
What do animals as diverse as corals and monkeys have in common? - correct answer ✔✔
presence of Hox genes
The Hox genes came to regulate each of the following in what sequence, from earliest to most
recent?
1. identity and position of paired appendages in protostome embryos
2. anterior-posterior orientation of segments in protostome embryos
3. positioning of tentacles in cnidarians
4. anterior-posterior orientation in vertebrate embryos - correct answer ✔✔ 3 → 2 → 1 → 4
The last common ancestor of all animals was probably a - correct answer ✔✔ flagellated protist.
What is the probable sequence in which the following clades of animals originated, from
earliest to most recent?
, 1. tetrapods
2. vertebrates
3. deuterostomes
4. amniotes
5. bilaterians - correct answer ✔✔ 5 → 3 → 2 → 1 → 4
Arthropods invaded land about 100 million years before vertebrates did so. This most clearly
implies that - correct answer ✔✔ arthropods have had more time to coevolve with land plants
than have vertebrates.
An adult animal that possesses bilateral symmetry is most certainly also - correct answer ✔✔
triploblastic
At which developmental stage should one be able to first distinguish a diploblastic embryo from
a triploblastic embryo? - correct answer ✔✔ gastrulation
What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates -
correct answer ✔✔ have a body cavity completely lined by mesodermal tissue, whereas
pseudocoelomates do not.
You have before you a living organism, which you examine carefully. Which of the following
should convince you that the organism is acoelomate? - correct answer ✔✔ Muscular activity of
its digestive system distorts the body wall.
The blastopore is a structure that first becomes evident during - correct answer ✔✔
gastrulation
