A non-walled, multinucleate mass of cytoplasm that resembles a moving mass of slim that is produced by plasmodial slime molds is called a Sorocarp. Plasmodium. Pseudopod. Filamental hyphe. Motile endospore.
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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 |