Tag: post fertilization - plants

Quizzes (0) Questions (68)

Questions Related to post fertilization - plants

Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

The structure which can show the effect of traits brought by the male gamete immediately after its formation is

  1. Embryo

  2. Cotyledons

  3. Endosperm

  4. Plumule
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Endosperm nourishes the developing embryo. It is formed by the fusion of male gamete with the diploid secondary nucleus that results in the formation of a triploid primary endosperm mother cell. In double fertilization, one male gamete fuses with the egg cell to form the zygote and the other male gamete fuses with the diploid secondary nucleus to form the endosperm. It is formed immediately after fertilization because it has to nourish the developing embryo. So, the correct answer is C.
Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

Cardamoms or Cardamons are ripe and dried fruits of

  1. Elettaria cardamomum

  2. Cinnamomum zeylenicum

  3. Eugenia caryophyllata

  4. Zingiber officinale
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cardamoms are ripe and dried fruits of  Elettaria cardamomum, commonly called green or true cardamoms. They are called the 'queen of spices' because of the aroma and taste. 

Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

In angiosperms, triple fusion produces

  1. Polar nucleus

  2. Secondary nucleus

  3. Primary endospermic nucleus

  4. Zygotic nucleus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Double fertilization process is observed in angiosperms in which syngamy takes place in the beginning. After syngamy the pollen tubes releases two male gametes, one fuses with the nucleus of egg cell and the other with the central cell and forms primary endosperm nucleus (PEN). The process is called as triple fusion as endosperm is triploid in nature.

So, the correct option is 'Primary endospermic nucleus'.

Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

Endosperm of flowering plants develops from

  1. Haploid nucleus

  2. Diploid nucleus

  3. Triploid nucleus

  4. Tetraploid nucleus

  5. Polyploid nucleus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Flowering plants are Angiosperms. Angiosperms have a unique phenomenon of "Double Fertilisation" in which, after the release of two male gametes inside the embryo sac by the pollen tube, one male gamete i.e. the first male gamete which is too near to egg fuses with egg nucleus and this phenomenon is known as fertilisation or syngamy. During syngamy, a zygote is formed. The other male gamete i.e. the second male gamete migrates towards the secondary nucleus (formed from the fusion of two polar nuclei) and fuses with it. This phenomenon is known as triple fusion and results in the formation of a triploid primary endosperm mother cell which forms triploid endosperm. Thus, Endosperm is formed from a triploid nucleus.
So, the correct answer is C.
Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

Seeds contain embryo.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A seed is an embryonic plant enclosed in a protective outer covering known as the seed coat.
It is the product of the ripened ovule which occurs after fertilization and some growth within the mother plant. The formation of the seed completes the process of reproduction in seed plants (started with the development of flowers and pollination), with the embryo developed from the zygote and the seed coat from the integuments of the ovule.
Therefore, the correct answer is option A.
Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

A fruit is a

  1. Ripened ovary

  2. Ripened ovule

  3. Seed plus its integuments

  4. Fused carpel
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fruit is a seed-bearing structure in flowering plants formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate seeds.  A fruit results from maturation of one or more flowers, and the gynoecium of the flower forms all or part of the fruit. The outer, often edible layer, is the pericarp, formed from the ovary and surrounding the seeds, although in some species other tissues contribute to or from the edible portion. The pericarp may be described in three layers from outer to inner, the epicarp, mesocarp and endocarp. 

So the correct option is 'ripened ovary'.

Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

The ovary of a flower grows into a fruit.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Fruit is a ripened ovary of the plant which also bears certain accessory structures in it. It is a part of the plant that develops from the fertilized ovary. Ovules in the ovary develop into seed. The ovary is the part of the female reproductive structure of the flower, the pistil. Ovary bears ovules inside it.

So, the correct answer is 'True'.
Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

Plumed seeds occur in

  1. Naravelia

  2. Taraxacum

  3. Calotropis

  4. Colutea
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plumed seeds occur in Calotropis. The seeds are compressed, broadly ovoid, with a tufted micropylar coma of long silky hair. The crown of the hair on the seeds favouring anemochory give the plumed appearance.

Thus, the correct answer is option C.

Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

Upon fertilization while ovule develops into seed. Which structure develop from a carpel?

  1. Testa

  2. Tegmen

  3. Pericarp

  4. Perisperm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Upon fertilization while ovule develops into seed. Pericarp develops from carpel. The pericarp is typically made up of three distinct layers, the epicarp, which is the outermost layer, the mesocarp, which is the middle layer and the endocarp, which is the inner layer surrounding the ovary or the seeds. In a citrus fruit, the epicarp and mesocarp make up the peel.
Therefore, the correct answer is option C.