Mosquitoes suck blood through a tube. Two parents with medium-length tubes have offspring. One of their offspring has a short tube, and one has a long tube. How did the offspring end up with traits that are different from the traits of their parents

Molecules called lipids have long hydrocarbon chains that determine the way they act. they can be fats, oils, or hormones, and even exist in our cell membranes 

They are both used to view parts of the cell

There are four nitrogenous bases that make up dna. the two pyramidines are thymine and cytosine. the two purines are adenine and guanine. these bases pair in a very specific way. adenine - thymineguanine - cytosine i remember it like this: a tall, good cat.