Question:
Differentiate between:- Hypocotyl and epicotyl;
- Coleoptile and coleorrhiza;
- Integument and testa;
- Perisperm and pericarp
Differentiate between:
- Hypocotyl and epicotyl;
- Coleoptile and coleorrhiza;
- Integument and testa;
- Perisperm and pericarp
Updated On: Oct 12, 2023
Hide Solution
Verified By Collegedunia
Solution and Explanation
Differentiate between
(a)
| Hypocotyl | Epicotyl | |
| 1. | The portion of the embryonal axis which lies below the cotyledon in a dicot embryo is known as the hypocotyl. | The portion of the embryonal axis which lies above the cotyledon in a dicot embryo is known as the epicotyl. |
| 2. | It terminates with the radicle. | It terminates with the plumule. |
(b)
| Coleoptile | Coleorrhiza | |
| It is a conical protective sheath that encloses the plumule in a monocot seed. | It is an undifferentiated sheath that encloses the radicle and the root cap in a monocot seed. | |
(c)
| Integument | Testa | |
| It is the outermost covering of an ovule. It provides protection to it. | It is the outermost covering of a seed. | |
(d)
| Perisperm | Pericarp | |
| It is the residual nucellus which persists. It is present in some seeds such as beet and black pepper. | It is the ripened wall of a fruit, which develops from the wall of an ovary | |
Was this answer helpful?
0
0
Top Questions on sexual reproduction in flowering plants
The following question is based on pollination. Study the figures carefully and answer the questions that follow.
- Give the scientific terms for the processes taking place in Figures A and B respectively.
- Mention two conditions necessary for the process occurring in Figure B.
-
- [(i)] State one advantage and one disadvantage of the process occurring in Figure B.
OR - [(ii)] Name one plant where, in some flowers only, the process in Figure B takes place and give the reason responsible for it.
- [(i)] State one advantage and one disadvantage of the process occurring in Figure B.
- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
- Student to attempt either option (A) or (B): (A) What is meant by ‘right’ and ‘wrong’ type of pollen when pollen lands on the stigma? A two-celled right type pollen has landed on the stigma. Explain the events taking place till fertilization in angiosperms. Why is pollen pistil interaction said to be dynamic?
OR
(B)- Give the schematic representation of oogenesis in human females indicating chromosome number at each step.
- In which part of the female reproductive system do the following events take place?
- I. Formation of corpus luteum
- II. Maturation of tertiary follicle
- III. Fertilisation
- IV. Implantation
- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
- Choose the option that correctly describes the gynoecium of Michelia:
- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
- Given below are the events that are observed in an artificial hybridisation programme. Arrange them in the correct sequential order and select the correct option.
- Re-bagging
- Selection of parents
- Bagging
- Dusting the pollens on stigma
- Emasculation
- Collection of pollens from male parent
- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
- Select the following statements that are true for insect pollinated flowers from the given options.
- Majority of these flowers are large, colourful and rich in nectar.
- Nectars and seeds are usual floral rewards to attract insects for pollination.
- Pollen grains of these flowers are generally mucilaginous so as to stick to the body of the insects.
- A foul odour is emitted by some flowers to attract flies and beetles.
- CBSE CLASS XII - 2025
- Biology
- sexual reproduction in flowering plants
View More Questions
Questions Asked in CBSE CLASS XII exam
- Write a comprehensive report on Republic Day celebrations held in your school. You are Heena of class XII E, a member of the school magazine editorial board.
- CBSE CLASS XII - 2025
- Letter Writing
- The values of $\lambda$ so that $f(x) = \sin x - \cos x - \lambda x + C$ decreases for all real values of $x$ are :
- CBSE CLASS XII - 2025
- Functions
- Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the codes (A), (B), (C), and (D) as given below.
Assertion (A): In double slit experiment, if one slit is closed, diffraction pattern due to the other slit will appear on the screen.
Reason (R): For interference, at least two waves are required.
- CBSE CLASS XII - 2025
- Wave optics
- In the given figure, three identical bulbs P, Q, and S are connected to a battery.
[(i)] Compare the brightness of bulbs P and Q with that of bulb S when key K is closed.
[(ii)] Compare the brightness of the bulbs S and Q when the key K is opened.
Justify your answer in both cases.
- CBSE CLASS XII - 2025
- Current electricity
- A current flows through a cylindrical conductor of radius \( R \). The current density at a point in the conductor is \( j = \alpha r \) (along its axis), where \( \alpha \) is a constant and \( r \) is the distance from the axis of the conductor. The current flowing through the portion of the conductor from \( r = 0 \) to \( r = \frac{R}{2} \) is proportional to:
- CBSE CLASS XII - 2025
- Current Density
View More Questions
Concepts Used:
Post-Fertilization Events
There are series of events that happen in the development of plants after their fertilization process to form a fruit from a diploid zygote. The four different developmental steps that occurs during post fertilization are:
- Development of an Endosperm: The endosperm, a tissue, present in the seed during the fertilization, precedes the development of an embryo. It is categorized into three types.
- Nuclear Formation
- Cellular Formation
- Helobial Formation
- Development of an Embryo: Embryogeny is the embryo development process and it starts developing at the micropylar end of the embryo sac in the zygote. The formation stages of embryogeny are almost the same in both the plants dicot and monocot, regardless of their structure.
- Monocot Embryo
- Dicot Embryo
- Development of a Seed: A Seed has Three Body Parts:
- Seed Coat
- Cotyledon
- Embryo Axis
- Formation of a Fruit: After the cell division and separation in the ovary, it is changed into fruit because of stimuli received from fertilization just as developing seed. The pericarp which might be fleshy like guava, tomato, or cucumber or might be weathered and dry like pea, bean, or mustard. After all the events the two types of fruits are formed:
- True Fruit
- False Fruit