Answer:
II. meiosis
III. fertilization
IV. gametes
Explanation:
Gamete formation and fertilization are the processes performed by all the sexually reproducing organisms. Gametes are the cells that are formed in the male and female sexual organs of these organisms. Formation of gametes occurs by meiosis and therefore, the gametes of a diploid organism are always haploid.
Male and female gametes fuse during the process of fertilization and form the zygote which in turn divide repeatedly to produce an embryo. For instance, sperms and eggs are the male and female gametes that are formed in testes and ovaries of male and female human individuals respectively. The fusion of sperm and egg produces a zygote that finally develops into a young one.
ALL sexual life cycles have in common Meiosis, Fertilization and Gametes (Options II, III and IV).
Meiosis is a type of reductional sexual cell division by which a parent cell produces four daughter cells or 'germinal cells' with half of the genetic material.
Female and male gametes are germinal cells. During fertilization, a female and a male gamete fuse in order to produce a zygote.
Subsequently, this zygote grows and develops into an adult organism.
In conclusion, ALL sexual life cycles have in common Meiosis, Fertilization and Gametes (Options II, III and IV).
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