Part III Pollination And Fertilization Flashcards
What is pollination?
The transfer of pollen from anther to stigma.
What are the two types of pollination?
Self-pollination and cross-pollination.
Define self-pollination.
Pollen from the same plant fertilizes the ovule.
Define cross-pollination.
Pollen from a different plant fertilizes the ovule.
What is an agent of pollination?
An external factor aiding pollination.
Name two agents of pollination.
Wind, insects
How does wind pollination occur?
Wind carries pollen to stigmas.
Why is insect pollination important?
Insects transfer pollen while feeding.
Name two insects that aid in pollination.
Bees, butterflies.
What happens during fertilization?
The fusion of male and female gametes.
What is double fertilization?
Two fertilization events: zygote and endosperm formation.
What forms during double fertilization?
Zygote and endosperm.
What is the function of the zygote?
Becomes the embryo of the seed.
What does the second sperm nucleus fertilize?
The polar nuclei.
What is the role of the endosperm in double fertilization?
Nourishes the developing embryo.
How does double fertilization benefit seed development?
Provides nutrition for embryo development.
What is the purpose of the ovary in fruit formation?
Protects the seed and aids in dispersal.
How does fruit formation aid in seed protection?
Prevents seed damage and aids dispersal.
What is the relationship between seed and fruit formation?
Seeds are enclosed in fruits for protection and spread.
What nutrients are provided by the endosperm?
Carbohydrates, proteins, and fats.
