A student creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

Greg is telling his teacher how a cell is like a house. Which part of a cell is like the air in Greg's house? Cell membrane Cell wall Cytoplasm Vacuole

Which change of state is shown in the model? O condensation O deposition O boiling Ofreezing

Most cells are quite small. Limits on cell size are related to limits on the rate of movement of "good stuff in" and "bad stuff out" across cell membrances. Movement rates are greatly influecnced by the surface area-to-volume ratio

To be considered a molecule must be capable of replication A True B false

What is the history of man?

Which epithelial tissue type is most often found lining large ducts, such as those of the salivary glands or pancreas?

Evolution led to certain fishes, such as lung fishes to adapt to terrestrial mode of life. These fishes were the ancestors of modern amphibians. Which evolutionary mechanism is represented by this example?

As part of a science experiment, Jose did a test for starch on a slice of apple and a slice of potato. The yellow-orange iodine solution stayed the same color when it was put on the apple, but it became black on the potato.

What's the difference between transgression and marine regression

In DNA adenine levels were equal to thymine levels and cytosine levels were equal to guanine levels.