1. What two characteristics of air were demonstrated when we pushed in the plunger and then let it go? 2. What is air made up of? What is between them?
3. How can we smell something like a cup of coffee (or another liquid)?
4. How do liquids become odor particles in the air so that people can smell them? Does our model of gases fit other
matter-like liquids?

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .

Which observation supports the inference that humans and chimpanzees share a common ancestor

The diagram shows a model of dna. which part of the dna molecule codes for the amino acid sequence in the protein?