A vein in a leaf has what important function? a. forming a venation pattern
b. supporting the leaf blade
c. permitting guttation
d. controlling the opening of stomata

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules