The horseshoe crab looks very similar to its fossil ancestor from the jurassic era. why has the horseshoe crab not evolved? a. its original form always remained well adapted to its environment. b. the species was affected by natural selection. c. the species did not pass on genetic information to its offspring. d. the species underwent major mutations in a short period of time.

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

For which pair of objects would adding the same a

The cheetah is considered the fastest running animal in the world. cheetahs can accelerate to a speed of 20.1 m/s in 2.50 s and can continue to accelerate to reach a top speed of 28.1 m/s. assume the acceleration is constant until the top speed is reached and is zero thereafter.1) starting from a crouched position, how long does it take a cheetah to reach its top speed? (express your answer to three significant figures.) s2) how far does it travel in that time? (express your answer to three significant figures.) m3) if a cheetah sees a rabbit 120 m away, how long will it take to reach the rabbit, assuming the rabbit does not move? (express your answer to three significant figures.)