Arteries contain blood that is ...

a. high in oxygen

b. low in oxygen

c. both high and low

Describe how Salinity varies in Chesapeake Bay

What does the complete spectrum of light all included

Select the correct answer from each drop-down menu. Humans use many chemical substances for farming that consequently affect biodiversity. These compounds, which are rich in nitrogen and phosphorus, are used to fertilize crops.

Imagine that you have just found a package of seeds, something very silly happens. Write about the silly event.

What determines the 3-dimensional shape of a protein?

Which of the following statements cannot be tested by science?

Can you explain how salt from the sea is returned to the land

A species of rabbit is preyed upon by foxes, which are preyed upon by wolves. Humans decide to open a hunting season on the wolf population.

Nearly all nutrients present in tropical rainforest forests are contained in the

One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship’s captain, who had polydactyly, a rare dominant trait, was one of the original colonists.