The nucleus is surrounded by a semipermeable membrane. what would happen if this layer were permeable to most substances?

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

The image shows a group of fish. the type of social behavior shown in the image is called

What two conditions must be present for osmosis to occur?