Why does ribosomes use rna instead of dna?

After some “pre-processing” inside the nucleus, the much shorter mRNA molecule (compared to the DNA chromosomes) is transferred from the nucleus to the cell cytosol, where a ribosome (aided by transfer RNA (tRNA)) performs the translation from mRNA to a protein (or, as the case may be, to another RNA) molecule.

d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation:

the organisms are not adapted to live in some communities or habitats.