BotanyLesson 1 of 2 in the course Plant Reproduction

Plant Reproduction: Flower Structure, Gametophytes, and Seeds

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

Plant reproduction involves two alternating life stages and, in flowering plants, specialized structures that support sexual reproduction. This lesson introduces the plant life cycle and the parts of a typical flower.

Plants alternate between a haploid gametophyte stage and a diploid sporophyte stage. The gametophyte produces male and female gametes by mitosis in specialized multicellular structures. When the gametes fuse, they form a diploid zygote, which develops into the sporophyte.

All flashcards

What is alternation of generations?
A plant life cycle that alternates between a haploid gametophyte generation and a diploid sporophyte generation.
What is the role of the calyx?
The calyx is the collective term for the sepals, which form the outer flower whorl and help protect the unopened bud.
What are the four main flower whorls?
The calyx, corolla, androecium, and gynoecium.
How does a perfect flower differ from a complete flower?
A perfect flower has both an androecium and a gynoecium. A complete flower has all four whorls, including the calyx and corolla.
What is the difference between monoecious and dioecious species?
Monoecious species bear male and female flowers on the same plant; dioecious species bear them on separate plants.

Quiz questions

  1. Which plant generation produces gametes by mitosis?Answer: The haploid gametophyte.
  2. What does the mature sporophyte produce by meiosis?Answer: Haploid spores.
  3. Which flower whorl is made of stamens?Answer: The androecium.
  4. A flower has sepals, petals, and carpels but no stamens. How is it classified by completeness?Answer: Incomplete.
  5. A plant bears male flowers on one individual and female flowers on another. Which term describes the species?Answer: Dioecious.

Based on Biology 2e by Mary Ann Clark, Matthew Douglas, Jung Choi (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

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