While observing a litter of puppies, Amy and Jose noticed that the puppies had a variety of black and white coat colors. They knew that the puppies had the same parents and that all of the puppies were from the same litter. Which of the following best explains why these puppies had different coat colors?

The permo-triassic extinction event had a greater impact on the number of earth’s species than did the extinction event at the end of the cretaceous. question 4 options: true false

Which of the following is not a symptom of desertification?

Match each law or principle to its description. 1. law of original horizontality sediment continues to spread in a flat plane until it hits an edge or runs out of material. 2. law of superposition the youngest strata are at the top and the oldest are at the bottom. 3. law of original lateral continuity sediment gets pulled down by gravity in a horizontal and flat layer. 4. law of cross-cutting or intrusive relationships if there is a fracture or intrusive feature seen in rock strata, it is younger than the rock strata.