Whales have what seem like remnants of a pelvis and femur, as shown here.
An x-ray image of a whale tail. The pelvis and femur bones are shown.
What are these structures an example of?
transitional structures
analogous structures
vestigial structures
adapted structures
Answers: 1
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Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?
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Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos
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Whales have what seem like remnants of a pelvis and femur, as shown here.
An x-ray image...
An x-ray image...
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