Human activities that clear large areas of land and increase erosion contribute directly to what type
of pollution?
a. biological
b. groundwater
sediment
d. toxic chemical

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome