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

Post-fertilization, the ovule changes into a/an

  1. Seed

  2. Fruit

  3. Endosperm

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

  • During fertilisation, there is a fusion of the male and the female gametes. 
  • In the case of angiosperms, there is a phenomenon called as double fertilisation. 
  • There is a formation of zygote and endosperm after triple fusion. The zygote gets transformed to form the embryo. 
  • The ovule gets converted to seed and the ovary develops to form the fruit. the integuments form the seed coat. 
Thus, 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

Endothelium develops from

  1. Endostome

  2. Exostome

  3. Chalaza

  4. Inner layer of integument
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The outer and inner integument of the ovule are of dermal derivation. The endothelium develops from the inner layer of integument. It is also called as  integumentary tapetum. At maturity, it becomes about 14-cell layers thick. The middle layers give the shape of the ripe seed. 

Thus, the correct answer is option D.

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

Read the statements given below and determine the correct statements.
(i) Seeds require moisture for germination.
(ii) Plants can absorb nutrients mostly in dissolved form.
(iii) Irrigation protects crops from both frost and hot air currents.
(iv) Irrigation improves soil texture.
Choose the combination of statements which indicate the need to irrigate crops.

  1. (i) and (ii)

  2. (i), (ii), (iii)

  3. (i), (ii), (iii), (iv)

  4. (i) and (iii)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A dormant seed contains only 10-15% of water and is essentially dehydrated. The seed has to absorb water in order to become active. Plants grow by absorbing nutrients from the soil and all the nutrients have to be in the dissolved form.
Irrigation does not always improve soil texture. Irrigation does not protect the crops from frost. Irrigation is the artificial application of water to the land or soil. It is used to assist in the growing of agricultural crops, maintenance of landscapes, and revegetation of disturbed soils in dry areas and during periods of inadequate rainfall.

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

A fruit is

  1. a ripened ovary

  2. an enlarged ovule

  3. an enlarged aggregate of several flowers

  4. a mature female gametophyte
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A fruit is the seed-bearing structure in flowering plants (also known as angiosperms) formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate seeds. 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 form the edible portion. The pericarp may be described in three layers from outer to inner, the epicarp, mesocarp and endocarp. A fruit results from maturation of one or more flowers, and the gynoecium of the flower(s) forms all or part of the fruit

So the correct answer is 'a ripened ovary'

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

After fertilization, ............ develops into seed and ............ into fruit.

  1. Ovary, Ovule

  2. Ovule, Ovary

  3. Embryo sac

  4. Egg cell
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fertilization occurs when one of the sperm cells fuses with the egg inside of an ovule. After fertilization occurs, each ovule develops into a seed. Each seed contains a tiny, undeveloped plant called an embryo. The ovary surrounding the ovules develops into a fruit that contains one or more seeds.

So, the correct answer is 'Ovule, Ovary'.

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

After fertilization, the outer integument forms 

  1. Testa

  2. Tegmen

  3. Perisperm

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

After fertilization process, the different cells in the embryo sac develops to form several parts of the embryo. For instance, the outer integument forms testa, inner integument forms tegmen and ovary wall forms pericarp.

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

In angiosperms, triple fusion is necessary for the formation of 

  1. Seed coat

  2. Fruit wall

  3. Embryo

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

The haploid sperm and haploid egg combine to form a diploid zygote, while the other sperm and the two haploid polar nuclei of the large central cell of the megagametophyte form a triploid nucleus. It will later develop into the endosperm, nutrient tissue which provides nourishment to the developing embryo.

Multiple choice biology plants: structure and function growth and development in plants sexual reproduction in plants post fertilization - plants

In which of the following plant, the fruit is a drupe, seed coat is thin, embryo is inconspicuous and endosperm is edible?

  1. Groundnut

  2. Wheat

  3. Apple

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

The fruit of the coconut is a large, dry drupe composed of a thin outer layer (exocarp), a thick, fibrous middle layer called as a mesocarp and a hard inner layer called as an endocarp that surrounds a large seed. A small, cylindrical embryo is embedded in the endosperm nutritive tissue just opposite the functional germination pore. The seed is surrounded by an outer brown layer called as the seed coat or testa.
Thus, the correct answer is option D.