On which thickly clouded planet has radar mapping revealed a varied topography consisting of plains, highlands, and thousands of volcanic structures?

a. venus

b. jupiter

c. mercury

d. neptune

A. Venus  

Venus is a planet which is little smaller than earth. Venus is a rocky planet with a volcanic landscape. It exhibit a thick, toxic and reducing atmosphere due to the abundance of gases like carbon dioxide, nitrogen and clouds of sulfuric acid and water droplets present in it.

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in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: