1. are unicellular organisms that lack a nucleus 2. A second membrane, called the , is found outside the wall in some bacteria.

3. are the most rare of the two different domains of prokaryotes, and are found primarily is harsh conditions.

4. The protective structure that a prokaryote may form when conditions are unfavorable is called an

5. Bacterial growth can be slowed or blocked using medications called .

6. Bacteria can connect and exchange pieces of DNA, called plasmids, through a process known as .

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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.

yes it is weird but true