NEET Exam  >  NEET Tests  >  Test: Post-Fertilization (Structures & Events) - NEET MCQ

Test: Post-Fertilization (Structures & Events) - NEET MCQ


Test Description

15 Questions MCQ Test - Test: Post-Fertilization (Structures & Events)

Test: Post-Fertilization (Structures & Events) for NEET 2024 is part of NEET preparation. The Test: Post-Fertilization (Structures & Events) questions and answers have been prepared according to the NEET exam syllabus.The Test: Post-Fertilization (Structures & Events) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Post-Fertilization (Structures & Events) below.
Solutions of Test: Post-Fertilization (Structures & Events) questions in English are available as part of our course for NEET & Test: Post-Fertilization (Structures & Events) solutions in Hindi for NEET course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: Post-Fertilization (Structures & Events) | 15 questions in 15 minutes | Mock test for NEET preparation | Free important questions MCQ to study for NEET Exam | Download free PDF with solutions
Test: Post-Fertilization (Structures & Events) - Question 1

Milk of tender coconut represents (i) and the surrounding white coconut meal represents (ii).

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 1

In coconut (Cocos nucifera), the surrounding white kernel called coconut meal is cellular endosperm and the coconut water (also called coconut milk) in the centre is free nuclear endosperm made up of thousands of nuclei.

Topic in NCERT: Endosperm Development

Line in NCERT: "The coconut water from tender coconut that you are familiar with, is nothing but free-nuclear endosperm (made up of thousands of nuclei) and the surrounding white kernel is the cellular endosperm."

Test: Post-Fertilization (Structures & Events) - Question 2

Assertion : In the most common type of endosperm development, the PEN undergoes successive nuclear division to give rise to free nuclei.
Reason : Embryo develops at the chalazal end of the embryo sac where zygote is situated.

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 2

∗ In the most common type of endosperm development, the PEN undergoes successive nuclear division to give rise to free nuclei.
∗ Embryo develops at the micropylar end of the embryo sac where zygote is situated.
Topic in NCERT: Endosperm
Line in NCERT: "In the most common type of endosperm development, the PEN undergoes successive nuclear divisions to give rise to free nuclei.
 Embryo develops at the micropylar end of the embryo sac where the zygote is situated.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Post-Fertilization (Structures & Events) - Question 3

The endosperm cells in angiosperms are:

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 3
  • Endosperm is formed during double fertilization.
  • It is triploid because it is formed when one of the two sperm that is haploid enters inside the embryo sac & fuses with two polar nuclei (each polar nuclei is haploid).
  • So the endosperm formed is triploid.

Hence, the correct option is B.
Topic in NCERT: Endosperm
Line in NCERT: "The primary endosperm cell divides repeatedly and forms a triploid endosperm tissue."

Test: Post-Fertilization (Structures & Events) - Question 4

Endosperm is consumed by a developing embryo in the seed of ______.

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 4

  • Endosperm can be classified into two types according on how it is consumed during development: endospermic and non-endospermic.
  • If the endosperm is consumed by the growing embryo, it is said to be non-endospermic.
  • In some plants, the endosperm is completely absorbed by the embryo, some of the examples are peas, beans, and green gram, in this type of food is stored in dicot seeds.
  • Whereas in some dicots, food is stored in endosperm examples are castor, maize, etc.
  • In the case of coconut, the endosperm is present in the liquid form and it is stored.

Hence, The correct answer is option (C).

Topic in NCERT: Endosperm

Topic in NCERT: Endosperm

Line in NCERT: "Endosperm may either be completely consumed by the developing embryo (e.g., pea, groundnut, beans) before seed maturation or it may persist in the mature seed (e.g. castor and coconut) and be used up during seed germination."

Test: Post-Fertilization (Structures & Events) - Question 5

Identify the wrong statement regarding post fertilization development.

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 5

After fertilisation, the integuments of the ovule form the protective coats (seed coats). Outer integument develops into testa and the inner one develops into tegmen.

Topic in NCERT: The development of fruit from the ovary

Line in NCERT: "The wall of the ovary develops into the wall of fruit called pericarp."

Test: Post-Fertilization (Structures & Events) - Question 6

Coleorhiza and coleoptile are the protective sheaths coverging_______and__________respectively.

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 6

  • The epicotyl bearing shoot apex and leaf primordia are enclosed in a foliar structure called coleoptile. It protects the plumule during emergence from the soil.
  • The radicle is protected in a sheath called coleorhiza. It protects the radicle during its passage into the soil.
  • So, the correct answer is " radicle, plumule ".

Topic in NCERT: Embryo

Line in NCERT: "At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorrhiza. The portion of the embryonal axis above the level of attachment of scutellum is the epicotyl."

Test: Post-Fertilization (Structures & Events) - Question 7

Identify the parts labelled A, B and C in the given figure and select the correct option.

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 7

Given figure represents the monocotyledonous embryo of a grass.

Topic in NCERT: Embryo

Line in NCERT: "The cotyledon is called scutellum that is situated towards one side (lateral) of the embryonal axis. At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorrhiza. The portion of the embryonal axis above the level of attachment of scutellum is the epicotyl. Epicotyl has a shoot apex and a few leaf primordia enclosed in a hollow foliar structure, the coleoptile."

Test: Post-Fertilization (Structures & Events) - Question 8

In the most common type of endosperm development:

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 8

In the most common type of endosperm development:
- The PEN undergoes successive nuclear divisions to give rise to free nuclei.
- Subsequently, cell wall formation occurs.
This process implies that the initial divisions of the PEN do not involve cell wall formation; instead, the formation of free nuclei precedes cell wall development. This sequence is a fundamental aspect of endosperm development, ensuring the creation of a structured cellular framework during this critical stage of plant growth.
Topic in NCERT: Endosperm"
Line in NCERT: "In the most common type of endosperm development, the PEN undergoes successive nuclear divisions to give rise to free nuclei. This stage of endosperm development is called free-nuclear endosperm."

Test: Post-Fertilization (Structures & Events) - Question 9

The diagram shows stages in embryo development in a dicot where A, B, and C respectively are:

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 9

(B) The correct answer is B: Globular embryo, Heart-shaped embryo, Mature Embryo.
- Globular embryo: At this stage, the embryo is spherical in shape.
- Heart-shaped embryo: The embryo develops into a heart shape as it matures.
- Mature Embryo: This is the final stage where the embryo is fully developed and ready for seed formation.
Understanding these stages helps track the growth of a dicot embryo from its early spherical form to its mature, seed-forming stage.Globular embryo, Heart shaped embryo, Mature Embryo
Topic in NCERT: Embryo
Line in NCERT: "The developing embryo passes through different stages such as the proembryo, globular and heart-shaped stages before maturation."

Test: Post-Fertilization (Structures & Events) - Question 10

The cells of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes? 

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 10

In angiosperms, endosperm is a triploid structure.
∴ 3n = 24 (given), then n = 8
As gametes are haploid structures, therefore number of chromosomes in gametes is 8

Test: Post-Fertilization (Structures & Events) - Question 11

Identify the parts labelled as A, B, C and D in the given figure and select the correct option from the codes given below

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 11

Correct option is D. A-Seed coat, B-Endosperm, C-Cotyledon, D-Hypocotyl

Test: Post-Fertilization (Structures & Events) - Question 12

Persistent nucellus is called as______________and is found in __________.

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 12

In some seeds, remains of nucellus persist. This residual nucellus which persists in the seed is called perisperm, e.g., black pepper, coffee, castor, cardamum, Nymphaea.

Topic in NCERT: Seed

Line in NCERT: "Occasionally, in some seeds such as black pepper and beet, remnants of nucellus are also persistent. This residual, persistent nucellus is the perisperm."

Test: Post-Fertilization (Structures & Events) - Question 13

Endosperm development precedes ____ development.

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 13

Endosperm development precedes embryo development because the endosperm provides nutrients to the developing embryo: 

  • Endosperm formation

    During double fertilization, one sperm nucleus enters the embryo sac and fuses with two polar nuclei to create the endosperm. 

  • Endosperm function

    The endosperm provides nutrients to the embryo, protects it, and controls its growth. In mature albuminous seeds, the endosperm stores starch and fat.

Topic in NCERT: Endosperm

Line in NCERT: "Endosperm development precedes embryo development."

Test: Post-Fertilization (Structures & Events) - Question 14

In the given diagram, X represents

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 14

Nuclear endosperm (X) is the most common type of endosperm. It is named so because it contains free nuclei in the beginning. The primary endosperm nucleus divides of free nuclei. Meanwhile central vacuole appears in the central cell and pushes the cytoplasm containing the nuclei to the periphery. The cytoplasm thickens so that the vacuole decreases in size. It ultimately disappears with the exception of a few cases. The multinucleate cytoplasm undergoes cleavage and gives rise to a multicellular tissue, e.g., maize, wheat, rice, sunflower, Capsella bursa-pastoris.

Topic in NCERT: Endosperm

Line in NCERT: "Endosperm development is called free-nuclear endosperm."

Test: Post-Fertilization (Structures & Events) - Question 15

Go through the given diagram of a typical dicot embryo. In which of the following all the 3 parts labelled as A, B, C with their respective functions are correctly identified

Detailed Solution for Test: Post-Fertilization (Structures & Events) - Question 15

- A: Plumule
- Function: Develops into the shoot system, including stems and leaves. It is the embryonic shoot.
- B: Cotyledons
- Function: Seed leaves that store nutrients for the embryo. In dicots, they typically store food to support the seedling's growth.
- C: Radicle
- Function: Develops into the root system. It is the first part of the embryo to emerge during germination.
These components collectively form the embryonal axis of a dicotyledonous embryo.

Topic in NCERT: Embryo
Line in NCERT: "A typical dicotyledonous embryo (Figure 1.14a), consists of an embryonal axis and two cotyledons."

Information about Test: Post-Fertilization (Structures & Events) Page
In this test you can find the Exam questions for Test: Post-Fertilization (Structures & Events) solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Post-Fertilization (Structures & Events), EduRev gives you an ample number of Online tests for practice

Top Courses for NEET

Download as PDF

Top Courses for NEET