Which of the following is a common environmental problem caused by mining? a. introduction of invasive species b. contamination of water supplies c. destabilization of earth's mantle d. formation of holes in the ozone layer

The influenza virus cause the flu, but not other diseases. why?

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Drag each label to the correct location on the chart. match the function to the type of tissue