An example of an indicator species is the sea otter. without sea otters, sea urchins would overgraze on kelp beds, dramatically changing the marine community. true or false.

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Acompany produces items in small batches. the machinery needs to warm up before the items can be produced. the scatterplot shows the time needed to produce batches of different numbers of items. based on the line of best fit, which of these statements is true?

What are some of the impacts of humans on the earth?