Multiple Choice
How many pollen grains can potentially result from one microsporocyte?
36. Plant Reproduction
Flowers
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How do most flowering plants avoid self-fertilization?
A
Most plant species are dioecious.
B
The physical arrangement of stamens and carpels makes self-fertilization unlikely.
C
Stamens and carpels on the same plant mature at different times.
D
They discourage pollinators.
E
They display self-incompatibility and reject their own pollen.
Verified step by step guidance1
Understand the concept of self-fertilization: Self-fertilization occurs when a plant's own pollen fertilizes its ovules, leading to less genetic diversity.
Recognize the importance of genetic diversity: Genetic diversity is crucial for the adaptability and survival of plant species, as it allows them to better withstand environmental changes and diseases.
Identify mechanisms to avoid self-fertilization: Many flowering plants have developed mechanisms to prevent self-fertilization and promote cross-pollination, which increases genetic diversity.
Learn about self-incompatibility: Self-incompatibility is a genetic mechanism in which a plant can recognize and reject its own pollen or pollen from genetically similar individuals, thus preventing self-fertilization.
Explore other strategies: Besides self-incompatibility, plants may also have physical arrangements of reproductive organs, different maturation times for stamens and carpels, or dioecious structures to avoid self-fertilization.
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