Mutations<span> are errors in codons caused by changes in nucleotide bases</span>
Double layered nuclear, the outer nuclear membrane is continuous with the membrane of the rough endoplasmic reticulum (ER), it also continues with the inner nuclear membranes since the two layers are fused together at a numerous tiny holes called nuclear pores that perforate the nuclear enevelope
The correct answer among the options given is the last option. Fossil fuels are the resources that cannot be renewed. Resources that cannot be renewed or replenished are referred as non-renewable resources. Fossil fuels are made for very long periods of time and cannot be replenished instantly.
The gas particles are freely moving because they aren't tightly arranged together.
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The soil on a valley floor
The soil on the hillside can roll down because of rain, landslides, etc , and so it would continue to develop in the areas
The soil in the valley floor, however, should be staying in the same condition for most of the time
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