I'd say the answer is D, as it's the most beneficial choice.
Answer:
Gen lac z: codifies the enzyme β-galactosidase, that hydrolyzes lactose in glucose and galactose.
The other two structural genes are lacy, which is a permease that helps to transfer lactose into the cell. Finally, lacA is a trans-acetylase.
Also, the operon counts with a promoter, that is the region recognized by the RNA polymerase. An Operator region, that is recognized by the LacI repressor, and the repressor gen lacL.
Answer:
Due to less number of chlorophyll.
Explanation:
The variegated leaves accumulates or produces less amount of food than non-variegated leaves under similar condition because variegated leaves has number of chlorophyll as compared to non-variegated leaves. Chlorophyll is a green pigment that is responsible for the photosynthesis in plants, without chlorophyll no photosynthesis occurs in the plants. The variegated leaves has less number of chlorophyll as compared to non-variegated leaves which leads to less production of food in variegated leaves.