Tumor-suppressor genes are normal human genes that prevent uncontrollable cell growth. starting with a normal laboratory human cell line, describe how you could use transposon tagging to identify tumor-suppressor genes. (note: when a te hops into a tumor-suppressor gene, it may cause uncontrolled cell growth. this is detected as a large clump of cells among a normal monolayer of cells.)

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Explanation:

First you need to develop a complete growth of human cells, in its natural state. Remember, you need to divide the group into the control one and the other that is going to go trough the treatment. Then, using the DNA data base, you need to encode the tumor suppressor and the genetic code of the tumor.

When you have both DNA, you need to take it into the normal cells (both groups), the DNA of the tumor to produce it.

When the cells present the unusual growing (cancer), it is time to introduce the other DNA sequence, so, it will observe how is the behavior of the tumor cells, if they  stop reproducing the cancer cells or they continue the same.

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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.

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