Activity 1. You have been presented with four outcrops from different locations.
2. Correlate matching layers of rock from the locations A, B and C so that matching
layers are next to each other. Draw lines to identify the correlated layers.
3. Draw a red line between layers of rock to identify where rock layers are missing.
4. Determine the relative age (as a range of time) of the rock layers. Label the age.
5. Try to correlate the rock layers of location D. You will answer questions specific to
layer D after completing this activity.

Which would be an adaptation in a rainforest, but not in a tundra? a. ability to store water for a long time b. fur that blends in with snow c. strong claws for killing prey d. a beak that can dig into thick trees

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.