During meiosis, genetic recombination may occur more than once through the process of resulting in an increase in genetic variability. a) transcription b) crossing over c) allele sequencing d) frameshift mutation

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters