Free Sexual Reproduction In Flowering Plants (Monthly Quiz: 1) NEET Biology Questions & Answers with Detailed Explanation & Full Review

  1. Home
  2. NEET
  3. Quiz
  4. Biology
  5. Sexual Reproduction In Flowering Plants
  6. Quiz-1
Daily Updates & Posts Today's Quiz
Daily Updates & Posts Today's Quiz
Free Sexual Reproduction In Flowering Plants (Monthly Quiz: 1) Time:

Question-1

Attractants and rewards are required for

(a)

(b)

(c)

(d)

Explanation:

Answer: (a)

Entomophily is the most common type of zoophily where pollination takes place through the agency of insects. Entomophilous flowers are brightly coloured and secrete nectar to attract visiting insects. Anemophily (wind pollination) and hydrophily (water pollination) do not require attractants or rewards due to the involvement of abiotic pollinating agents. Cleistogamy is self pollination in closed flowers.

Question-2

If there are 4 cells in anthers, what will be the number of pollen grains?

(a)

(b)

(c)

(d)

Explanation:

Answer: (a)

Pollen grains or microspores are formed inside anther, which is the fertile portion of stamen or microsporophyll. Inside the anther, primary sporogenous cell gives rise to microspore mother cells or pollen mother cells (MMC or PMC). Each MMC on reduction division gives rise to 4 microspores or pollens. So, these four cells will give rise to 4 × 4 = 16 pollen grains.

Question-3

Tegmen develops from

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

Outer protective covering of seed is called seed coat which develops from integuments of ovules. The seeds developing from bitegmic ovule have two layers. The outer layer is called testa and inner layer is called tegmen which develops from inner integuments.

Question-4

Two plants can be conclusively said to belong to the same species if they

(a)

(b)

(c)

(d)

Explanation:

Answer: (d)

If two plants can reproduce freely with each other and form seeds, they are concluded to belong to same species. Plants belonging to same species have mostly every character common and will be able to reproduce freely with each other to produce new generations.

Question-5

If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be

(a)

(b)

(c)

(d)

Explanation:

Answer: (c)

If the female plant is tetraploid, then the central cell of embryo sac, which is a fused polar nuclei, will also be tetraploid. Fusion of the tetraploid central cell to the haploid male gamete forms a pentaploid endosperm in the given example.

Question-6

Male gametophyte of angiosperms is shed at

(a)

(b)

(c)

(d)

Explanation:

Answer: (c)

The male gametophyte or microspore is shed at 3-nucleate stage. The microspore undergoes only two mitotic divisions.

Question-7

Which of the following is a mismatched pair?

(a)

(b)

(c)

(d)

Explanation:

Answer: (d)

When the pollination takes place in between the two different flowers of two different plants of the same species then it is called xenogamy. This is real or true cross-pollination. Genetically, as well as ecologically, it is cross-pollination.

Question-8

Assertion:
Polyembryony is found in all angiosperm.
Reason:
All angiosperm are produced by apomixis.

(a)

(b)

(c)

(d)

Question-9

Embryo sac is formed by

(a)

(b)

(c)

(d)

Question-10

Phoenix dactylifera is

(a)

(b)

(c)

(d)

Question-11

Which one of the following represents an ovule, where the embryo sac. becomes horse shoe-shaped and the funiculus and micropyle are close to each other?

(a)

(b)

(c)

(d)

Question-12

Sperm and egg nuclei fuse due to

(a)

(b)

(c)

(d)

Question-13

Megasporangium is equivalent to

(a)

(b)

(c)

(d)

Question-14

Identify A to D respectively-ABCD Line of dehiscence

sexual-reproduction-in-flowering-plants-class-12-Chapter-2-neet-mcq-6-527-16

(a)

(b)

(c)

(d)

Question-15

Triple fusion is a result of

(a)

(b)

(c)

(d)

Question-16

Parthenocarpic tomato fruits can be produced by

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

Development of fruits without fertilization is called parthenocarpy and such fruits are called parthenocarpic fruits. Parthenocarpic fruits are seedless. A flower is emasculated and auxins are applied to the stigma of the flower, it forms a parthenocarpic fruit. For parthenocarpy induction by auxins, these should be applied after anthesis (first opening of flower) and by gibberellins, these should be applied earlier i.e., at anthesis.

Question-17

Diagram given below shows the stages in embryogenesis in a typical dicot plant (Capsella). Identify the structures A to D respectively Zygote Globular Embryo Heart-Shaped Embryo Mature Embryo A B C D

sexual-reproduction-in-flowering-plants-class-12-Chapter-2-neet-mcq-5-24-63-211

(a)

(b)

(c)

(d)

Explanation:

Answer: (a)

The given figure shows the stages in embryogenesis in a typical dicot (Capsella). The structure marked as A, B, C and D is respectively suspensor, radicle, plumule and cotyledon. Suspensor is a suspending part or structure as a group or chain of cells that is produced from the zygote of a seed plant and serves to push the developing embryo into the endosperm. Radicle is the part of a plant embryo that develops into the primary root. Plumule is the young shoot of a plant embryo above the cotyledons, consisting of the epicotyl and often of immature leaves. Cotyledon is an embryonic leaf in seed-bearing plants, one or more of which are the first leaves to appear from a germinating seed.

Question-18

Male gametophyte in angiosperms produces

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

The protoplast of the male gametophyte divides mitotically to produce two unequal cells — a small generative cell and a large vegetative cell. The generative cell divides later into two non-motile male gametes (or sperms). Thus, the male gametophyte in angiosperms produces two sperms and a vegetative cell. The vegetative cell, later on, grows to produce pollen tube.

Question-19

The largest cell in a embryo sac is

(a)

(b)

(c)

(d)

Explanation:

Answer: (c)

Central cell is the cell in the venter of the archegonium whose division produces the egg and usually also the ventral canal cell (as in cycads). It is the largest cell the in an embryo sac.

Question-20

Adventive polyembryony in citrus is due to

(a)

(b)

(c)

(d)

Explanation:

Answer: (a)

The embryos arising from the maternal sporophyte tissues are called adventive embryos. In poly-embryonic species the adventive embryo arises by the proliferation of the nucellus cells.

Molecular Basis Of Inheritance

Quiz 32

Biotechnology Principles And Processes

Quiz 33

Biotechnology And Its Applications

Quiz 34

Organisms And Populations

Quiz 35

Ecosystem

Quiz 36

NEET Biology Quiz

Topic Wise Quizzes

NEET Biology MCQ

Topic Wise Exercise

NEET Biology

Recently Uploaded Posts
Trending & Popular Posts

Today Quiz

Anatomy Of Flowering Plants

This Week Quiz

Locomotion And Movement

This Month Quiz

Locomotion And Movement