A stratigraphic layer in one location overwhelmingly represents one species, while the same species is discovered in a similar stratigraphic layer hundreds of kilometers away. What method is used to provide an estimate of age for this layer and this species?

A. biostratigraphy
B. carbon 14
C. Steno’s law of superposition
D. Dendrochronology

Which of the following statements is true? a. there is not enough food produced in the world to feed everyone. b. the biggest cause of hunger and malnutrition is the cost of getting food to people who need it most. c. most countries have enough arable land and resources to feed their own population and export a surplus d. malnourishment is only seen in a few countries with very limited food supplies.

70 pts answer the following questions in full sentences and paragraphs, using at least 150 words, in the essay box below. 1. which organisms are carnivores? herbivores? omnivores? 2. if the ecosystem is balanced, which populations should be the largest? the smallest? 3. imagine a group of hunters kills half of the rabbit population. how will the other organisms be affected? 4. imagine disease kills 85 percent of the wolf population. how will the other organisms be affected? 5. imagine a foreign mountain lion species is introduced into the ecosystem. how will the other organisms be affected?

After world war 2, many people moved from the cities to?