Scientists think that dolphins and whales may have evolved from a common ancestor. Fossils have been found showing how this organism slowing evolved into the seperate organism. These fossils are know as A.
Index Fossil

B.
Dervied Fossil

C.
Avada kedarva Fossil

D.
Transitional Fossil

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?