Question 29 which headline would be an example of gene therapy? pet fish glow under ultraviolet light farmer brown's pigs have less saturated fat prize winning orchid is a hybrid gene added to bone marrow improves immune system function

The right answer is D.

Gene therapy is a method of introducing nucleic acids (DNA or RNA) into the cells of an organism to correct an abnormality, such as a mutation, causing a pathology. It is often a question of bringing a normal and functional gene (transgene) into a cell where the present gene is altered.

Another method can bring RNA capable of partially regulating or blocking the expression of an altered gene.

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the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.