Tag: gynoecium

Questions Related to gynoecium

The monocotyledonous seed consists of one large and shield shaped cotyledon known as

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Aleurone layer

  2. Scutellum

  3. Coleoptile

  4. Hilum

  5. Coleorhiza

Show answer
Correct Option: B
Explanation:

The scutellum is referred to the eqivalence of a thin cotyledon in monocots. It is very thin with high surface area, and serves to absorb nutrients from the endosperm during germination.

Study of seeds is a part of

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Pomology

  2. Morphology

  3. Vegetative morphology

  4. Reproductive morphology

Show answer
Correct Option: D
Explanation:

Study of seed is part of reproductive morphology because during study of seed, we observe the processes occuring after the sexual reproduction of plants and its growing into a plant. 
 The correct option is 'Reproductive morphology'.

Which one is the national fruit of India?

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Mango

  2. Banana

  3. Orange

  4. Cashewnut

Show answer
Correct Option: A
Explanation:

National fruit of India is Mango (Mangifera indica).

So, the correct answer is 'Option A- Mango'.

The remnants of nucellus present in the seed constitute

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Endosperm

  2. Endocarp

  3. Perisperm

  4. Aril

Show answer
Correct Option: C
Explanation:

The nucellus is generally used up during the development of embryo but in some cases it remains outside the endosperm in the form of a thin layer, called perisperm.

So, the correct answer is 'Perisperm'.

Seed of black pepper is

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Endospermic

  2. Exalbuminous

  3. Acotyledonous

  4. Perispermic

Show answer
Correct Option: D
Explanation:

A. Endospermic seed- Reserve food material present in endosperm.

B. Exalbuminous- Reserve food material present in cotyledons.
C. Acotyledonous- Seed which lack cotyledons, e.g. Orchids.
D. Perispermic- Seed which contain perisperm are perispermic seed,it occur in the seeds of black pepper, coffee, castor, cardamum, nymphaea.
So, the correct answer is 'Perispermic'.

Ovule integument gets transformed into

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Seed

  2. Seed coat

  3. Fruit wall

  4. Cotyledons

Show answer
Correct Option: B
Explanation:
After fertilisation in the flower, ovule gets transformed into the seed. The outer integument of the ovule becomes Testa and the inner integument becomes Tagmen. Testa and Tagmen are the two layers of the seed coat. The outer layer of seed coat is Testa which is very tough and the inner layer of seed coat is Tagmen which is very delicate. Hence, integuments get transformed into the seed coat.
So, the correct answer is B.

Identify the wrong statement regarding post fertilization development.

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Ovary wall develops into pericarp.

  2. Outer integument of ovule develops into tegmen.

  3. Ovule develops into seed.

  4. Ovary develops into fruit.

Show answer
Correct Option: B
Explanation:
After fertilization has occurred in the ovule, many post fertilization changes take place like:
• Ovary wall develops into the pericarp of the fruit.
• Outer integument develops into testa and inner integument develops into tegmen.
• Ovule develops into the seed.
• Ovary develops into the fruit. 
Hence, statement B given in the question is incorrect. So, the correct answer is B.

Pericarp of fruit develops from

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Wall of ovary

  2. Nucellus

  3. Funicle

  4. Seed coat

Show answer
Correct Option: A
Explanation:

The outer most layer of the fleshy fruits is called as pericarp developed from the ovary wall of the flower and surrounds the seeds. Fruits are the mature ovaries of one or more flowers.

So the correct option is 'Wall of ovary'.

A seed is formed from

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Ovule

  2. Embryo

  3. Embryo sac

  4. Ovary

Show answer
Correct Option: A
Explanation:
After fertilization in the ovule, many changes occur such as:
• Ovule develops into a seed.
• Egg cell develops into an embryo.
• Ovary develops into a fruit.
Thus, a seed is formed from the ovule. So, the correct answer is A.

In Pea, wrinkling of seeds is due to nonformation of starch because of the absence of enzyme

botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

  1. Amylase

  2. Invertase

  3. Branching enzyme

  4. Diastase.

Show answer
Correct Option: C
Explanation:

In pea, the gene which controls starch synthesis also controls the shape of the seed.

In the pea plant with wrinkled seeds, this gene is not involved in the synthesis of starch due to the absence of enzyme starch synthase. It is a branched enzyme.

So, the correct option is ‘Branching enzyme’.