A student while observing an embryo of a pea seed in the laboratory listed various parts of the embryo as given below: Testa, Tegmen, Radicle, Plumule, Micropyle, Cotyledon. On examining the list the teacher remarked that only three parts are correct. Select three correct parts from the above list:
A student while observing an embryo of a pea seed in the laboratory listed various parts of the embryo as given below: Testa, Tegmen, Radicle, Plumule, Micropyle, Cotyledon. On examining the list the teacher remarked that only three parts are correct. Select three correct parts from the above list:
Options
The correct option is (d). The three correct parts of a pea seed embryo are the Radicle, Cotyledon, and Plumule.
Marking Scheme
- 11 Mark for selecting the correct option (d) containing Radicle, Cotyledon, and Plumule.
Hint
Recall the parts of a seed that develop into the future root and shoot, along with the food storage structures.
Quick Oral Answer
The parts of a seed embryo are the plumule, radicle, and cotyledons. The plumule gives rise to the shoot system, the radicle gives rise to the root system, and the cotyledons store food for the developing seedling.
Analysis & Explanation
An embryo is the tiny, undeveloped plant contained within a seed. It consists of three main parts:
- Radicle: The embryonic root that develops into the future root system.
- Plumule: The embryonic shoot that develops into the future shoot system.
- Cotyledon: The embryonic leaf (or leaves) that stores food for the developing seedling.
- Why option (d) is correct: Radicle, cotyledon, and plumule are the actual structural components of the embryo itself.
- Why other options are incorrect:
- Testa and Tegmen are the outer and inner protective layers of the seed coat, respectively, and are not part of the embryo.
- Micropyle is a tiny pore in the seed coat that allows water and oxygen to enter during germination; it is not a part of the embryo.
Common Mistakes
- 1Confusing seed coat layers (testa, tegmen) or the seed pore (micropyle) as parts of the embryo itself.
Interesting Facts
The cotyledons of a pea seed remain below the ground during germination (hypogeal germination), providing nutrients to the growing embryo until it can photosynthesize.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2016?
This question carries 1 mark in the CBSE Class 10 Science 2016 examination.
Which chapter does this question come from in Science?
This question is from the chapter "How do Organisms Reproduce?" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Structure of a Dicot Seed / Embryo" from CBSE Class 10 Science.
Has this question appeared in other CBSE Science papers?
Yes, a similar question appeared in the 2016 CBSE Class 10 Science paper.
What type of question is this in the CBSE Class 10 Science 2016 paper?
This is a MCQ question from Section B in the CBSE Class 10 Science 2016 paper.