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

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )