Peacocks (the males) have very long feather trains, while peahens (the females) do not. why don’t the feather trains just get longer, and longer, and longer every generation? what would happen if the females preferred feather trains that gave the males the best or most efficient flying ability?   this chapter deals with genetic variation and natural selection.

As , plants meet their needs for making food from air, soil, water, and the sun's energy in a process called there are plants called grow high in trees without here are words to put in the blanks. 1.) producers 2.) consumers 3.) chloroplasts 4.) epiphytes

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?

The energy available as a result of the motion of a body is called energy. -potential -gravitational -kinetic -chemical