The colourful part of the Sunflower or Marigold plant is
Inflorescence
Identifying the Colourful Part of Sunflower and Marigold
Let's analyze the question about the colourful part of plants like Sunflower and Marigold. These plants are well-known for their bright and attractive 'flowers'. However, botanically speaking, what we commonly perceive as a single flower in these plants is actually something more complex.
Understanding the Structure of Sunflower and Marigold
Sunflower (Helianthus annuus) and Marigold (Tagetes species) belong to the plant family Asteraceae (also known as Compositae). A key characteristic of this family is that their 'flower' is not a single flower, but a cluster of many smaller flowers tightly grouped together. This cluster of flowers is called an inflorescence.
Analyzing the Options
Let's look at the given options:
- Flower: While the entire structure functions like a flower for pollination, it is not a single flower botanically. It is composed of many flowers.
- Inflorescence: This term specifically refers to a group or cluster of flowers arranged on a stem. In the case of Sunflower and Marigold, the showy, colourful structure is indeed an inflorescence, often called a 'head' or 'capitulum'. This inflorescence contains different types of small flowers called florets (ray florets on the outside, disk florets in the center).
- Fruit: Fruit develops from the ovary after pollination and fertilization. The colourful part is present before the fruit develops.
- Seed: Seeds are typically found within the fruit after ripening. The colourful part is the structure responsible for attracting pollinators, not the seed itself.
Based on the botanical structure of plants in the Asteraceae family, the colourful part of a Sunflower or Marigold plant is the inflorescence, which is a collection of many small flowers.
| Part | Description | Is it the Colourful Part of Sunflower/Marigold? |
|---|---|---|
| Flower | The reproductive unit of a plant, often solitary. | No, the structure in Sunflower/Marigold is a cluster of flowers. |
| Inflorescence | A cluster or arrangement of multiple flowers on a stem. | Yes, the showy head is an inflorescence containing many florets. |
| Fruit | Develops from the ovary after fertilization; contains seeds. | No, the colourful part is involved in reproduction before fruit formation. |
| Seed | An embryonic plant enclosed in a protective outer covering. | No, seeds are inside the fruit, not the colourful display structure. |
Conclusion on Sunflower and Marigold Structure
The vibrant and eye-catching part of Sunflower and Marigold plants that attracts pollinators is not a single flower but a specialized structure called an inflorescence. This structure is characteristic of their plant family, Asteraceae.
Revision Table: Key Terms
| Term | Definition |
|---|---|
| Inflorescence | A group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. |
| Capitulum (Head) | A dense cluster of sessile or subsessile flowers, characteristic of the Asteraceae family. This is the type of inflorescence found in Sunflower and Marigold. |
| Floret | One of the small flowers that make up the head of a composite flower (like Sunflower or Marigold). There can be ray florets (often look like petals) and disk florets (in the center). |
Additional Information on Asteraceae Inflorescence
The Asteraceae family is one of the largest plant families and is known for its unique inflorescence, the capitulum or head. This head is surrounded by bracts called phyllaries, which collectively form an involucre. The structure is highly effective for attracting pollinators because it mimics a large single flower, making it more visible. The individual florets within the head are typically small and less showy on their own. The colourful 'petals' are actually modified florets called ray florets, while the central part consists of many small disk florets which produce the seeds.
Similar Questions
- In aquatic plants, large air sacs give them buoyancy effects. These sacs are surrounded by which one of the following types of tissues?
Which one of the following statements is correct?
Which one of the following is NOT a component of conducting tissue in plants?
Which one of the following organisms has vascular tissues?
Which one of the following statements about classification of plants is correct?
Which one of the following statements about meristematic tissues in plants is correct?
Gametophytes of sexually reproducing flowering plants are
The seeds of flowering plants are made up of
Which one of the following tissues is known as basic packing tissue and found in xylem and phloem ?
The breakdown of glucose in cytoplasm results in the formation of
Important Questions from Botany
Which of the following is a type of nutrition?
I. Heterotrophic
II. Autotrophic
Fungi are always
Which of the following does NOT form an essential part of the process of photosynthesis?
Organisms that generate energy using light are:
Amarbel ( Cuscuta ) is a
