Botany Perfect & Imperfect Flowers

Questions and Answers

What is a perfect flower?

A flower that has both male and female reproductive parts (correct)

A flower with only male reproductive parts

A flower that is unisexual

A flower that is usually bright in color

What is an imperfect flower?

A unisexual flower missing either stamens or carpels.

What are sepals?

Leaflike parts that cover and protect the flower bud.

What is the function of petals?

Modified leaves usually bright in color to attract pollinators. Signup and view all the answers

What is the stamen?

The male reproductive part of a flower. Signup and view all the answers

What is a pistil?

The female reproductive part of a flower. Signup and view all the answers

What is the anther?

The terminal pollen sac of a stamen where pollen grains form. Signup and view all the answers

What does the filament do?

Supports the anther; it is the stalk of the stamen. Signup and view all the answers

What is the stigma?

Catches pollen; it is the head of the pistil. Signup and view all the answers

What is the style?

The stalk of a flower's carpel, with the ovary at the base and the stigma at the top. Signup and view all the answers

What is the ovary in a flower?

The structure that encloses and protects ovules and seeds as they develop. Signup and view all the answers

What is an ovule?

A structure that develops within the ovary of a seed plant and contains the female gametophyte. Signup and view all the answers

What is the androecium?

The third whorl collectively known as stamens. Signup and view all the answers

What does calyx refer to?

All the sepals. Signup and view all the answers

What is the gynoecium?

The group of structures that constitute the female reproductive organ, also called the pistil. Signup and view all the answers

What does monoecious mean?

Staminate and carpellate flowers are on the same plant. Signup and view all the answers

What is dioecious?

Having male and female reproductive organs in separate plants. Signup and view all the answers

What is the pedicel?

The stalk that supports the flower. Signup and view all the answers

What is the function of the receptacle?

Holds all the floral parts together. Signup and view all the answers

What are arabinogalactans?

A sticky substance in the stigma. Signup and view all the answers

Study Notes

Flower Types

Perfect Flower: Contains both male (stamens) and female (carpels) reproductive parts, allowing for self-pollination.
Imperfect Flower: Unisexual flower missing either stamens or carpels, requiring cross-pollination for reproduction.

Flower Structures

Sepals: Leaflike parts that protect the flower bud, safeguarding the developing bloom.
Petals: Modified leaves often brightly colored to attract pollinators, facilitating the reproductive process.

Male Reproductive Parts

Stamen: Male reproductive component of a flower, responsible for pollen production.
Anther: Terminal pollen sac of a stamen where pollen grains form and contain sperm-producing male gametophytes.
Filament: The supportive stalk of the stamen that elevates the anther for effective pollen dispersal.

Female Reproductive Parts

Pistil: The female reproductive organ of a flower, made up of stigma, style, and ovary.
Stigma: The receptive surface at the head of the pistil, responsible for capturing pollen.
Style: The elongated stalk that connects the stigma to the ovary.
Ovary: Protective structure that houses ovules and seeds during development, producing eggs.
Ovule: Contains the female gametophyte and develops within the ovary.

Floral Whorls

Androecium: The collective term for stamens, the male reproductive organ of flowers, consisting of an anther and filament.
Calyx: Composed of all sepals that enclose the petals of the flower.
Gynoecium: The inner whorl of structures that form the female reproductive organ, also known as the pistil.

Plant Sexual Systems

Monoecious: A plant species that has both staminate (male) and carpellate (female) flowers on the same individual.
Dioecious: Species where male and female reproductive structures occur on separate plants, requiring both for reproduction.

Additional Structures

Pedicel: The supportive stalk that elevates the flower, linking it to the main stem.
Receptacle: The thickened part of the stem at the base of the flower that holds floral parts together.
Arabino galactants: A sticky substance located in the stigma, aiding in pollen adhesion.

These concepts reflect the key reproductive and structural features of flowers, essential for understanding plant biology and reproduction.

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Description

Explore the differences between perfect and imperfect flowers through these flashcards. Each card provides key definitions and characteristics of floral structures, enhancing your understanding of plant reproduction. Perfect for botany students and enthusiasts alike!