Compare and contrast some features of prokaryotic and eukaryotic cells. Write the letter “P”, for prokaryote, or “E”, for eukaryote, next to each description.
a. Multiple chromosomes
b. DNA in cytoplasm
c. Single, circular chromosome
d. Membrane-bound nucleus
e. DNA inside nucleus
f. Lack of membrane-bound nucleus

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answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

the correct answer is d