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Significance of Double Fertilization

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Questions and Answers

What is the significance of double fertilization in angiosperms?

Increases the number of offspring produced by the parent plant

Ensures food store in the seed only if the egg is fertilized (correct)

Prevents the growth of pollen tubes in the ovule

Causes the formation of triploid zygotes

Who discovered the double fertilization mechanism in flowering plants?

Darwin

Nawaschin (correct)

Linnaeus

Mendel

How does the pollen tube reach the ovule in double fertilization?

By penetrating the integuments

Through the chalaza (correct)

By following chemical cues from the antipodal cells

By rupturing through the embryo sac

What guides the growth of the pollen tube towards the ovule?

Synergids secretions Signup and view all the answers

What is the term used when the pollen tube carrying male gametes penetrates one of the synergids?

Siphonogamy Signup and view all the answers

What happens after the pollen tube ruptures in double fertilization?

Release of two non-motile male gametes Signup and view all the answers

What is the main difference between syngamy and triple fusion in angiospermic plants?

Syngamy involves fusion of a male gamete with a female gamete to form a diploid zygote, whereas triple fusion involves fusion of a second male gamete with a diploid secondary nucleus to form primary endosperm nucleus. Signup and view all the answers

What is the outcome of syngamy during double fertilization in angiospermic plants?

Development of the embryo Signup and view all the answers

Which process leads to the development of the triploid endosperm in angiospermic plants?

Triple fusion Signup and view all the answers

Which term describes the fusion event where the second male gamete fuses with the diploid secondary nucleus in angiospermic plants?

Chalazogamy Signup and view all the answers

Why is double fertilization in angiosperms described as involving 'both male gametes'?

Both male gametes are involved in the formation of the zygote and endosperm. Signup and view all the answers