How does groundwater become polluted? a. Pollutants mixed with water pass through permeable layers above the aquifer. b. Factories dump their waste directly into aquifers. c. Refuse infiltrates the water table when garbage is dumped. d. All of the above

This is a coral reef ecosystem. many biotic and abiotic factors affect the health of this ecosystem. which set correctly pairs a biotic factor and an abiotic factor?

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

What function does a limb serve in each animal how are the limb bones of the four animal similar based on the similarities what can be inferred about the evolution of the poor animals