What is the function of the endoplasmic reticulum in a cell? A)providing a barrier between the cell and its surroundings
B)assembling lipids, proteins, and other materials for export out of the cell
c)converting energy from food into a form the cell can use
D)packaging proteins and other materials from the endoplasmic reticulum for storage in the cell or transport out of the cell

the answer is B

Explanation:

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.