Question:
Mature embryosac in majority of angiosperms is
Mature embryosac in majority of angiosperms is
Updated On: Jul 28, 2022
- 8 celled and 8 nucleate
- 7 celled and 8 nucleate
- 5 celled and 7 nucleate
- 3 celled and 4 nucleate
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
In angiosperms, the female gametophyte is called embryo sac. It is formed by three micropylar cells collectively known as egg apparatus (one middle cell called egg or oosphere and two nuclei are called synergids, cooperative cells or help cells), three chalazal cells called antipodals and large central cell which has 2 polar nuclei. It contain 8 nuclei but 7 cells - 3 micropylar, 3 chalazal and one central i.e., (3 + 2 + 3).
Was this answer helpful?
0
0
Top Questions on Angiosperms
- In angiosperms, the outer wall of ovary develops into :
- CUET (UG) - 2023
- Biology
- Angiosperms
- In a typical angiosperm, the mature embryo sac is:
- CUET (UG) - 2023
- Botany
- Angiosperms
- Maximum number of male gametes produced from one pollen mother cell in (microspore mother cell) will be:
- CUET (UG) - 2023
- Botany
- Angiosperms
- Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): Gnetum is closer to angiosperms than gymonsperms.
Reasons (R): There is complete elimination of archegonia in the female gametophyte of Gnetum.
In the light of the above Statements, choose the most appropriate answer from the options given below:- CUET (PG) - 2023
- Botany
- Angiosperms
- Typical mature embryosac of angiosperm is
- KCET - 2022
- Biology
- Angiosperms
View More Questions
Questions Asked in COMEDK exam
- The standard electrode potential for Daniell cell is $1.1\, volt$. What is the standard Gibbs energy for the reaction?
- COMEDK - 2015
- Gibbs Free Energy
- The girth or diameter of the stem increases due to the activity of the following
- COMEDK - 2015
- The Stem
- More number of oxidation state are exhibited by the actinoids than by lanthanoids. The main reason for this is :
- COMEDK - 2015
- The Actinoids
- Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of $10$ and the second has a voltage gain of $20$. If the input signal is $0.01\, volt$, what is the output $ac$ signal ?
- COMEDK - 2014
- Transistors
- Three charges $-q, +Q$ and $-q$ are placed at equal distances along a straight line. If the total $P.E.$ of the system is zero, the ratio $ \frac{Q}{q} $ becomes
- COMEDK - 2014
- Electrostatic potential
View More Questions
Concepts Used:
Angiosperms
A type of plant belonging to the kingdom Plantae is angiosperms. The term Angiosperm is acquired from two Greek words: Angio - ‘covered’ and Sperma - ‘seed’. They are the types of plants that contain flowers which is a well-defined feature and the seeds are enfolded within the fruits. Since they can bear both flowers and seeds are also called flowering plants, and also comprises around 80% of the living plants.
The Characteristics of Angiosperms are:
- The body of an angiosperm is evidently differentiated into several organs such as leaves, flowers, fruits, roots, stems, and seeds.
- Among these organs the decision of labor is well-coordinated, and each organ is peerlessly specialized for specific functions.
- Out of all angiosperms, most of them are herbs, shrubs, trees, climbers, etc.
- A vessel is the chief water and mineral that conducts Xylem elements.
- The sieve tube is the chief food that conducts Phloem elements.
- Endosperm has triploid cells.
- The angiosperms are basically divided into two groups, based on the presence of the number of cotyledons in the seed. They are
- Dicotyledonous or Dicot plants
- Monocotyledonous or Monocots Plants