Tag: growth and development in plants

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Questions Related to growth and development in plants

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

Endosperm of angiosperms results after fertilization from ................

  1. Antipodal cells

  2. Zygote

  3. Synergids

  4. Secondary nucleus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Endosperm of angiosperm results when the secondary nuclei which is diploid fuses with the second sperm entering the apparatus, which is haploid in nature.

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

The plant, whose seeds are known to have longest viability period is

  1. Nelumbo nucifera

  2. Triticum vulgare

  3. Zizyphus jujube

  4. Carica papaya

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water lotus (Nelumbo  nucifera) have an unusually long period of viable germination. Even if, a seed is in the ideal condition of germination, it might remain dormant for decades. They show self-preservation and resistance to germination. 

So, the correct answer is 'Nelumbo nucifera'

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

After fertilization ovary changes into

  1. Seed

  2. Flower

  3. Fruit

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
After the embryo formation, the female part and the ovule starts converting to protect the seed and ovary is the part which converts into fruit in which seed is kept in angiosperms.
So the correct option is 'Fruit'
Multiple choice biology reproduction in higher plants growth and development in plants sexual reproduction in plants post fertilization - plants

Caruncle develops from

  1. Outer integument

  2. Cotyledon

  3. Funiculus

  4. Inner integument
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A. Seed in many members of the Euphorbiaceae, such as castor, the soft outgrowth capping the hard seed is formed by proliferation of the cells at the tip of the outer integument called caruncle. It is rich in starch and sugars.

B. Cotyledons-  They  are thin, semi-transparent and oval in outline in castor. They have palmate venation. The middle costa or rib is more prominent and bears a few lateral veins.

C. Funiculus- It is a stalk like structure which attaches the ovule to the placenta.

D. Inner integument- It forms the tegman, inner covering of seed.

So, the correct answer is ‘Outer Integument’.

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

Which of the following structure forms fruit?

  1. Leaf

  2. Flower

  3. Root

  4. Ovary
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Fruits are the mature ovary or ovaries of one or more flowers. Fruits are produced only by flowering plants (angiosperms). Following pollination of the flower, the fertilized ovules develop into seeds while the surrounding ovary wall forms the fruit tissue or pericarp.
So, the answer is D.
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'.