Why are the tigris and euphrates rivers important to the people of the middle east? a. they are important for the shipping of oil b. they provide a passage between the mediterranean and red seas c. they are important sources of freshwater for drinking and irrigation d. they connect the persian gulf to the indian ocean

The covers all of earth like a thin shell, but it is not a solid sheet of material. it is broken up into several large sections and many smaller ones. fill in the blank.

What is the amount of organic matter in all living organisms in a habitat called?

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed