Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?

Higher organisms have resorted to sexual reproduction inspite of its complexity, why?

Higher organisms have resorted to sexual reproduction in spite of their complexity. Why ?

Higher organisms have resorted to sexual reproduction in spite of its complexity. Comment.

Higher organisms resorted sexual reproduction in spite of its complexity. Why?

Why do higher oranisms shift to sexual mode of reproduction is spits of these being complex?

Flower with its sexual reproductive organs

Sexual reproduction involves meiosis but the organisms produced by sexual reproduction restore same chromosomal number as its parent. Explain how.