How is it possible for someone to put an ear to a wall and hear someone in the next room?

Sound waves change to electromagnetic waves and then back again.

Sound waves can travel though solids.

There must be some air in the wall so the sound can travel through it.

The waves travel from room to room via air.

I WILL GIVE BRAINLIEST!!

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4

Amines amides and amino acids are categories of