The Cambrian explosion is a prime example of ________________.
mass extinction
evolutionary stasis
a large meteor impact
adaptive radiation
1 points
QUESTION 2
Most animals are viviparous.
True
False
1 points
QUESTION 3
The first phylum with ganglia in their nervous system are the ________________________.
Mollusca
Nematoda
Bivalvia
Platyhelminthes
1 points
QUESTION 4
The last common ancestor of all animals was probably a _____________________.
a unicellular worm
multicellular algae
flagellated protist
multicellular fungus
1 points
QUESTION 5
You are given an unknown organism to identify. It is unicellular and heterotrophic. It is motile by use of many short extensions of the cytoplasm. It has well-developed organelles and two nuclei, one large, one small. The organism is most likely to be a ______________.
foraminifera
radiolarian
ciliate
flagellate
1 points
QUESTION 6
Which of the following organisms would you expect to have the largest surface-area-to-volume ratio? Assume that all of the following are the same total length.
A mollusc
A nematode
A platyhelminth
Not enough information to determine.
1 points
QUESTION 7
If the animal is a hermaphrodite, it is said to be _______________.
dioecious
eutelic
monoecious
trioecious
1 points
QUESTION 8
A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange and segmentation. A knowledgeable zoologist should predict that the adults of this species would also feature ____________.
eight legs
two pairs of antennae
a sessile lifecycle
an open circulatory system
1 points
QUESTION 9
The Phylum Echinodermata exhibits metamerism.
True
False
1 points
QUESTION 10
The existence of evolutionary trends, such as increasing body sizes among horse species, is evidence that _____.
a larger volume-to-surface area ratio is adaptive in many mammals
evolution generally progresses toward some goal
evolution tends toward increased complexity or increased size
in particular environments, similar adaptations can be beneficial to more than one species
The Cambrian explosion is a prime example of ________________.
| mass extinction | ||
| evolutionary stasis | ||
| a large meteor impact | ||
| adaptive radiation |
1 points
QUESTION 2
Most animals are viviparous.
True
False
1 points
QUESTION 3
The first phylum with ganglia in their nervous system are the ________________________.
| Mollusca | ||
| Nematoda | ||
| Bivalvia | ||
| Platyhelminthes |
1 points
QUESTION 4
The last common ancestor of all animals was probably a _____________________.
| a unicellular worm | ||
| multicellular algae | ||
| flagellated protist | ||
| multicellular fungus |
1 points
QUESTION 5
You are given an unknown organism to identify. It is unicellular and heterotrophic. It is motile by use of many short extensions of the cytoplasm. It has well-developed organelles and two nuclei, one large, one small. The organism is most likely to be a ______________.
| foraminifera | ||
| radiolarian | ||
| ciliate | ||
| flagellate |
1 points
QUESTION 6
Which of the following organisms would you expect to have the largest surface-area-to-volume ratio? Assume that all of the following are the same total length.
| A mollusc | ||
| A nematode | ||
| A platyhelminth | ||
| Not enough information to determine. |
1 points
QUESTION 7
If the animal is a hermaphrodite, it is said to be _______________.
| dioecious | ||
| eutelic | ||
| monoecious | ||
| trioecious |
1 points
QUESTION 8
A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange and segmentation. A knowledgeable zoologist should predict that the adults of this species would also feature ____________.
| eight legs | ||
| two pairs of antennae | ||
| a sessile lifecycle | ||
| an open circulatory system |
1 points
QUESTION 9
The Phylum Echinodermata exhibits metamerism.
True
False
1 points
QUESTION 10
The existence of evolutionary trends, such as increasing body sizes among horse species, is evidence that _____.
| a larger volume-to-surface area ratio is adaptive in many mammals | ||
| evolution generally progresses toward some goal | ||
| evolution tends toward increased complexity or increased size | ||
| in particular environments, similar adaptations can be beneficial to more than one species |
