How many of the following statements concerning the loss of hind limbs during whale evolution are true? 1. it is well documented by a series of transitional fossils. 2. it explains why modern whales have vestigial pelvic girdles. 3. it involved changes in the sequence or expression of hox genes. 4. it is an example of macroevolution. 5. it, and the loss of limbs by snakes, are an example of similar adaptations to a similar environment. a) only one statement is true. b) two statements are true. c) three statements are true. d) four statements are true. e) all five statements are true.

Whay is the following best defines climate

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?

The cluster of developing cells from conception until birth is called an