You and your best friend observe a group of fish in a system of lakes. You believe it is due to an adaptive radiation, while your friend believes it is not Which piece of evidence would be decisive in showing that your best friene correct and that you were wrong? Findings that fish with larger mouth opening consume larger prey, while those wit smaller mouth openings specialize in smaller prey near shorelines. Data showing a single ancestral fish species colonized the system of lakes. Data showing that the species arose and speciated slowly. O.A correlation between mouth phenotypes and the environment the fish use.

There have been five main mass extinctions. Match each mass extinction event to its description. 1. Permian extinction 2. Cretaceous-Tertiary extinction 3. Triassic extinction 4. Devonian extinction 5. Ordovician extinction   a. This extinction was most likely due to a change in sea level. During this event, about 60% of all marine species were eliminated. b. This is the best-known mass extinction. It eliminated most large animals, including the dinosaurs. c. This was the most severe extinction event. About 96% of life on Earth died during this event. d. This extinction was most likely caused by climate change. About 80% of land animals died during this event. e. This extinction was most likely due to a change in sea level. It especially affected coral reefs.

One hypothesis for the Cambrian explosion was an increase in predator-prey relationships. It is thought that the resulting co-evolution of predator and prey may have been a factor in the rapid speciation of animals seen during this time. What findings in the fossil record would most support this? Group of answer choices a. increased incidence of larger-bodied animals b. increased incidence of sessile animals c. decreased incidence of animals with bilateral symmetry d. increased incidence of animals with radial symmetry e. increased incidence of shells, bony plates, spines, and/or claws

What three processes characterize many major transitions? Would you consider mammals such as cetaceans (whales & dolphins) moving from terrestrial to aquatic habitats as a major transition? Explain

Adaptive radiations will most likely occur in areas where; The climate is the same year round The landscape is mostly homogenous and all of the habitats are similar to each other The landscape has very limited soil nutrients The landscape is highly variable and there are many different habitats

Over a period of millions of years, cheetahs evolved to become faster and faster (as did their prey). Give a Lamarckian explanation of how cheetahs evolved to became faster. Then explain why this explanation is not scientifically possible.

he Cretaceous extinction, which was the most recent mass extinction, occurred about 65.5 million years ago. What is the leading hypothesis to explain the Cretaceous extenction?     The Indian sub-continent collided with the Asian techtonic plate, giving rise to the Hymalayan mountains which altered the jet stream and caused the planet to enter an ice age     A new group of predators evolved that were significantly better at capturing prey, to the point that they drove many species (including other predators and eventually themselves) to extinction     Massive amounts of volcanic activity released tons of CO2, enough to significantly increase the temperature of the planet     An asteroid about 6 km in diameter collided with Earth, which vaporized the caribbean ocean, set fire to north and south America, and expelled enough dust into the atmosphere to block the sun enough to result in a winter like environment all across the globe for several years