Multiple Choice
Which two animal groups are classified as ecdysozoans?
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31. Invertebrates
Ecdysozoans
Back31. Invertebrates
Ecdysozoans
- Multiple ChoiceWhat is the process of ecdysis in arthropods?515views
- Multiple ChoiceWhat is the name of the tough outer covering constructed by ecdysozoans?449views
- Multiple ChoiceThe arthropods superficially resemble earthworms in that both groups __________, yet the two are distinctly different because arthropods, but not earthworms, __________.981views
- Multiple ChoiceA major characteristic of arthropods is __________.1739views
- Multiple ChoiceIn most insects, gas exchange is accomplished by __________.1129views
- Multiple ChoiceIn arthropods, molting is necessary because __________.1336views
- Multiple ChoiceSowbugs are really crustaceans, not insects. Therefore, a sowbug does not have __________.1083views
- Multiple ChoiceThe majority of animal species are __________.1467views
- Multiple ChoiceAn unidentified species of animal displays the following characteristics: bilateral symmetry, a complete digestive system, an open circulatory system, distinct body segmentation, and a series of molting stages during growth. To which of the following animal phyla does this species most likely belong?950views
- Multiple ChoiceComplete metamorphosis __________.1090views
- Multiple ChoiceWhich of the following animals is most closely related to spiders?1346views
- Textbook Question
Which phylum is characterized by animals that have a segmented body?
a. Cnidaria
b. Platyhelminthes
c. Arthropoda
d. Mollusca
1497views - Textbook Question
What is the function of the arthropod exoskeleton?
a. The presence of an exoskeleton has given arthropods a good fossil record, because hard parts fossilize more readily than do soft tissues.
b. It has no well-established function. (Trilobites had an exoskeleton, and they went extinct.)
c. It provides protection and functions in locomotion.
d. It makes growth by molting possible.
1579views - Textbook Question
Why is the pea wrinkle-seed allele a recessive allele?
a. It 'recedes' in the F2 generation when homozygous parents are crossed.
b. The trait associated with the allele is not exhibited in heterozygotes.
c. Individuals with the allele have lower fitness than that of individuals with the dominant allele.
d. The allele is less common than the dominant allele. (The wrinkled allele is a rare mutant.)
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