The s–p value is a measure of the difference in time between the

The s-p value is a measure of the difference in time between the TIME OF ARRIVAL OF THE FIRST P WAVE and the FIRST S WAVE.

Explanation:

The s-p value is important in measuring the time in which the P and S wave arrives a seismic revising station from an earthquake.

The P and S wave are body waves, a class of seismic waves that travels through the interior of the Earth.

P wave travels faster than S waves.

P waves are involved in the forward and backward movement of matter.

S waves are involved in the side- to-side (perpendicular) movement of matter.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.