The correct option is
D. schizocarp.
Detailed Explanation:
- Definition of Schizocarp:
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A schizocarp is a type of dry fruit that, when mature, splits into multiple segments or parts, each containing one seed. This splitting occurs along predetermined lines of weakness in the fruit wall, allowing the seeds to be dispersed separately.
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Characteristics of Schizocarps:
- Schizocarps typically develop from a single ovary and can be found in various plant families, such as the Apiaceae (carrot family) and Malvaceae (mallow family).
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Each segment of a schizocarp is called a mericarp, and these segments can vary in shape and size depending on the species.
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Why Option D is Correct:
- The defining feature of a schizocarp is its ability to break apart into multiple parts, each containing a seed. This characteristic aligns perfectly with the question's description of a dry fruit that can break into several parts, making option D the correct answer.
Analysis of Other Options:
- Option A: Capsule:
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A capsule is a type of dry fruit that also splits open to release seeds, but it typically does so along multiple seams or pores rather than breaking into separate parts. Capsules can release many seeds at once, which is different from the segmented nature of a schizocarp. Therefore, while capsules do release seeds, they do not fit the description of breaking into several parts, making this option incorrect.
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Option B: Aggregate Fruit:
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An aggregate fruit is formed from a single flower that has multiple ovaries, each developing into a small fruitlet. Examples include raspberries and blackberries. Aggregate fruits do not break into separate parts containing seeds; instead, they remain attached to a central receptacle. Thus, this option does not match the description provided in the question.
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Option C: Legume:
- A legume is a type of dry fruit that typically splits along two seams (dehiscent) to release seeds, such as in peas and beans. While legumes do contain seeds and can break open, they do not break into multiple distinct parts like a schizocarp. Therefore, this option is also incorrect.
Summary of Key Points:
- A schizocarp is a dry fruit that splits into several parts, each containing one seed.
- Capsules release seeds through seams or pores, not as separate parts.
- Aggregate fruits consist of multiple fruitlets from one flower, not breaking apart into separate segments.
- Legumes split along two seams, releasing seeds but not forming distinct parts.
Revision Summary:
- Schizocarps break into multiple segments, each with one seed.
- Capsules and legumes do not fit the description of breaking into separate parts.
- Aggregate fruits consist of multiple fruitlets, not individual segments.
- Understanding the characteristics of different fruit types is crucial for identifying them correctly.