Comprehensive Answer Set on “The Flower” – ICSE Class 9

• Comprehensive Question Set on “The Flower” – ICSE Class 9
• Explore an in-depth set of questions and answers on “The Flower” for ICSE Class 9, including true/false, multiple choice, short answer, long answer, and application-based queries.

True (T) or False (F) Answers

1. True – Flowers can be categorized as complete or incomplete.
2. False – A typical flower consists of four floral whorls, not six.
3. True – Bracts are generally green but can sometimes be large and colorful.
4. True – Nasturtium is known to have nectaries.
5. True – Stamens and carpels are the male and female parts of a flower, respectively.
6. True – The prefix “gamo-” signifies fusion within floral whorls.
7. True – Stigma can be either simple or divided into multiple lobes.
8. False – Papaya is a dioecious plant, not monoecious.

Multiple Choice Questions (MCQs) Answers

1. D) Large colorful bracts
2. D) All four whorls
3. C) Ovary
4. C) Ovule
5. D) Androecium and Gynoecium
6. B) Peduncle
7. C) Stigma
8. B) Tepals
9. C) Polyandrous
10. D) Hermaphrodite

Very Short Answer Questions

Match the Following

• Polyadelphous – (a) Stamens united in multiple bundles.
• Free petals – (b) Non-essential.
• Sweet fragrant fluid – (c) Nectar.

Name the Following

1. Four whorls of a flower: Calyx, Corolla, Androecium, Gynoecium.
2. Two types of unisexual flowers: Staminate, Pistillate.
3. Two primary components of a stamen: Anther, Filament.
4. Three main parts of a pistil: Stigma, Style, Ovary.
5. Three types of stamens based on cohesion: Monadelphous, Diadelphous, Polyadelphous.

Provide Two Examples for Each

1. Monoecious plants: Maize, Cucumber.
2. Dioecious plants: Papaya, Date Palm.
3. Imperfect flowers: Pumpkin, Corn.
4. Bisexual flowers: Hibiscus, Rose.

Fill in the Blanks

1. Thalamus
2. Corolla
3. Calyx
4. Placenta
5. Nectar

Short Answer Questions

1. Definitions
   • Flower: A reproductive structure in flowering plants.
   • Inflorescence: The arrangement of flowers on a floral axis.
   • Placentation: The arrangement of ovules within the ovary.
   • Bract: A modified leaf associated with a flower.
   • Epicalyx: A whorl of bracts resembling the calyx.
2. Locations and Roles
   • Placenta: Located inside the ovary; attaches ovules to the ovary wall.
   • Thalamus: Base of the flower; holds all floral whorls.
   • Anther: Part of stamen; produces pollen.
   • Stigma: Part of pistil; receives pollen grains.
3. Differences
   • Flower vs. Inflorescence: A single reproductive unit vs. a group of flowers.
   • Petals vs. Petaloid Tepals: True petals vs. tepals resembling petals.

Long Answer Questions

1. Distinctions
   • Monoecious vs. Dioecious: Both male and female flowers on the same plant vs. on separate plants.
   • Perfect vs. Imperfect Flowers: Both reproductive organs present vs. only one.
   • Unisexual vs. Bisexual Flowers: Either male or female organs vs. both.
   • Polyandrous vs. Polyadelphous Stamens: Free stamens vs. stamens united into multiple bundles.
2. Explanations
   • Diadelphous Androecium in Pea: Stamens united into two bundles.
   • Neuter Ray Flowers of Sunflower: Lack functional reproductive organs.
   • Petaloid Sepals of Salvia: Sepals resembling petals in appearance.
3. Bracts: Modified leaves associated with flowers, often protective or attractive to pollinators.
4. Types of Stamens
   • Monadelphous: Stamens united into a single bundle (e.g., Hibiscus).
   • Diadelphous: Stamens united into two bundles (e.g., Pea).
   • Polyadelphous: Stamens united into multiple bundles (e.g., Bombax).

Structured/Application Questions

1. Labeling Flower Diagram: Identify and label the ten parts of a bisexual flower.
2. Floral Part Analysis
   • Major Organ: Figure A represents the androecium or gynoecium.
   • Nature of Pollen Sacs: Male.
   • Release Mechanism: Pollen sacs dehisce to release pollen.
3. Types of Androecium
   • Identify and give examples of each androecium type (Monadelphous, Diadelphous, Polyadelphous).
4. Diagrams: Draw labeled diagrams for the male and female reproductive organs of a flower.
5. Illustrations:
   • Polysepalous Calyx
   • Gamosepalous Calyx
   • Polypetalous Corolla
   • Gamopetalous Corolla
   • Bracteate Flower