Protostome Animals (Grades 11-12)
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Protostome Animals
1.
Which trait is NOT common among the protostomes?
- anterior brain
- dorsal nervous system
- bilateral symmetry body plan
- development of a mouth from a blastopore
2.
Which would NOT be found in a protostome animal with an incomplete digestive tract?
- nervous system
- endoderm
- ectoderm
- anus
3.
Some lophotrochozoans have a type of free-living larvae called a .
4.
Some wormlike ecdysozoans have a thin exoskeleton called a .
5.
Which group of crustaceans looks similar to the mollusks superficially?
- isopods
- decapods
- copepods
- barnacles
6.
Which group contains the largest number of species?
- rotifers
- annelids
- arthropods
- polychaetes
7.
Why are animals that have a thin cuticle usually restricted to moist habitats?
- The cuticle allows water to be lost across the body surface.
- There are fewer predators that thrive on these animals in this type of habitat.
- Moving water is essential for getting food to these animals.
- The sperm of these animals is non-motile so the water carries it to the egg.
8.
Why do animals with exoskeletons need to undergo periodic molting?
- Large amounts of food are needed to support the growth of the exoskeleton.
- The exoskeleton prevents animals from moving freely in the environment.
- The animal is growing inside of the exoskeleton, which does not grow along with it.
- The exoskeleton is a major attraction for predators.
9.
Which has NOT been a major part of protostome evolution?
- segmentation of the body cavity
- parasitism and complex live cycles
- improved mechanisms for locomotion
- mechanisms for ingesting large prey
10.
Why is the term "cephalopod" a good description for the octopus and squid?
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