Which of the Following Is Found in RNA but NOT

question 67

Multiple Choice

Which of the following is found in RNA but NOT in DNA?

• A) Adenine
• B) Thymine
• C) Uracil
• D) Deoxyribose
• E) Phosphate groups

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Definitions:

Sexual Isolation

A mechanism of evolutionary divergence where different species or populations can no longer interbreed due to behavioral or genetic barriers.

Gametic Isolation

A prezygotic barrier where gametes (egg and sperm) of different species are incompatible, preventing fertilization.

Mechanical Isolation

A form of reproductive barrier where differences in the size and shape of reproductive organs prevent mating between species.

Sympatric Speciation

The evolution of a new species within the same geographic region as the parental species. Compare with allopatric speciation.