#Question id: 4594
#Zoology
Which one of the following observations did Darwin first make during his discovery of evolution?
#Question id: 4599
#Zoology
Many crustaceans (for example, lobsters, shrimp, and crayfish) use their tails to swim, but crabs have reduced tails that curl under their shells and are not used in swimming. This is an example of ________.
#Question id: 4600
#Zoology
Scientific theories ________.
#Question id: 4601
#Zoology
DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against many insects. Which of these would have prevented this evolution of DDT resistance in insect pests?
#Question id: 4602
#Zoology
If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic-resistance genes, what would happen in environments that lack antibiotics?
#Question id: 4603
#Zoology
Of the following anatomical structures, which is homologous to the bones in the wing of a bird?