Consider these observations made by a student watching an aquarium tank containing marine snails. a tank contained snails that were crawling all over the sides of the tank. when an opened mussel was introduced in the middle of the tank, the snails began to move quickly toward the food. based on these observations, frame two hypotheses that you can test.

Which of the following terms describe a liquid molecule that has only single bonds between its carbon atoms

Which of the following matches the organisms described with the correct domain? a. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycanb. archaea--multicellular, eukaryotic organisms that do not have cell wallsc. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sourcesd. bacteria--unicellular, eukaryotic organisms that always lack cell walls

What was the land like over 500 million years ago? what was under the sea?