One sperm fuses with an egg to form a zygote, and another sperm fuses with a cell of the female gametophyte with two haploid nuclei in the distinctive angiosperm process known as
fertilization.

Question

One sperm fuses with an egg to form a zygote, and another sperm fuses with a cell of the female gametophyte with two haploid nuclei in the distinctive angiosperm process known as 
 fertilization.

BlackTom AI · Accepted Answer

Here is the fill-in-the-blank question and its available option presented clearly.
Question: 'One sperm fuses with an egg to form a zygote, and another sperm fuses with a cell of the female gametophyte with two haploid nuclei in the distinctive angiosperm process known as  fertilization.'
Options: ["空白1"]

Now, evaluate the options and reasoning:

- Option: 空白1
  - This option represents the placeholder for the missing word in the phrase describing the process. In the context of angiosperm fertilization, the correct term describes a two-part fertilization event: one sperm fertilizes the egg to form a zygote, and a second sperm fertilizes the central cell to form endosperm. The standard term for this process is 'double fertilization.' Therefore, the blank should be filled with the word that, together with 'fertilization,' yields the correct terminology. Since the provided answer is 'double,' this aligns with the first half of the term and completes the common phrase 'double fertilization.'

- If we consider alternative interpretations or common misconceptions:
  - Saying only 'fertilization' would be incomplete, because it omits the distinguishing feature of angiosperms where two fertilization events occur.
  - Using a different adjective (e.g., 'triple' or 'single') would be factually incorrect for angiosperms, which are defined by double fertilization.

- Additional context to reinforce why this is correct: in flowering plants, the pollen tube delivers two sperm cells; one sperm fuses with the egg to form the zygote (embryo) and the other sperm fuses with the two polar nuclei in the central cell to form the triploid endosperm, hence the term 'double fertilization.' This distinguishes angiosperms from gymnosperms and explains the necessity of the two fertilization events.

In summary, the single available option 空白1 corresponds to the blank that should be filled with 'double' to produce the established term 'double fertilization.'

One sperm fuses with an egg to form a zygote, and another sperm fuses with a cell of the female gametophyte with two haploid nuclei in the distinctive angiosperm process known as fertilization.

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