An individual carries two different alleles of the same gene. These will be located: A) On the same spot on two sister chromatids
B) On the same spot on the same chromosome
C) On different spot on the same chromosome
D) On the same spot on the two homologous chromosomes carrying that gene
E) On different spots on the two homologous chromosomes carrying that gene

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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.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

meiosis is the correct answer