The figure shows a classic experiment that demonstrates the principle of osmosis. the left side of the u-tube is filled half-way with 10% red sugar water. into the tube on the right, distilled water is poured until it is even with the red sugar water. a semi-permeable membrane is placed in the brown area. predict what will happen in the u-tube after several hours.

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

How does human environment effect the biosphere