Tag: seeds - structure and germination

Questions Related to seeds - structure and germination

A monocot showing reticulate venation is __________.

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Bombusa

  2. Smilax

  3. Callophyllum

  4. Ginkgo

Show answer
Correct Option: B
Explanation:

The phenomenon of an arrangement of veins on the leaf is known as venation. There are two kinds of venation. That is reticulate venation and parallel venation. Reticulate venation contains the irregular distribution of veins to form a network. Examples of plants presenting reticulate venation include rose, tulsi, hibiscus, papaya, Ficus, Bambusa. Parallel venation includes the veins running parallel to each other.

Examples of plants presenting parallel venation include grains, banana, canna, grass, Musa, plum. Leaves of monocot plants show parallel venation. Leaves of dicot plants show reticulate venation. Though, there are exceptions in monocots like Smilax and Colocasia. They show reticulate venation. Other options are not related with reticulate venation.

Thus, the correct option is B.

Scutellum is seed leaf of

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Gymnosperms

  2. Dicots

  3. Pteridophytes

  4. Monocots

Show answer
Correct Option: D
Explanation:

Scutellum is present in monocotyledons endospermic seed.

A. Gymnosperms- Seeds are naked.
B. Dicots- Seeds have two cotyledons.
C. Pteridophytes- Seeds are absent.
D. Monocots- Seeds have one cotyledons.
So, the correct answer is 'Monocots'.

An endospermic seed is

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Pea

  2. Gram

  3. Castor

  4. Bean

Show answer
Correct Option: C
Explanation:
The seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds.The seeds, which store food materials in endosperm are called  endospermic or albuminous seeds.
A. Pea- non- endospermic seed.
B. Gram- non- endospermic seed.
C. Castor- endospermic seed.
D. Bean- non- endospermic seed.
So, the correct answer is 'Castor'.

In cereal grain, single cotyledon is represented by

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Coleoptile

  2. Coleorhiza

  3. Scutellum

  4. Prophyll

Show answer
Correct Option: C
Explanation:

In grain seed, which is moncot and endospermic seed. the embryo consists of an upper shield shaped scutellum which is actually a reduced cotyledon. The scutellum is closely pressed against the endosperm and helps in the translocation of nutrients from endosperm to the growing embryo at the time of germination and seedling growth. So, the correct answer is 'Scutellum'.

Monocotyledonous/ wheat seed has one large shield - shaped cotyledon known as

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Coleoptile

  2. Scutellum

  3. Aleurone layer

  4. Coleorhiza

Show answer
Correct Option: B
Explanation:

Coleoptile is a sheath protecting a young shoot top in monocotyledons such as grasses. They have two vascular bundles, one on either side. 

The scutellum is part of the structure of a barley and rice seed- the modified seed leaf. It is the large shield shaped cotyledon.
Aleurone layer is the outermost proteinaceous layer of endosperm, followed by the inner starchy endosperm. It lies between the pericarp and the hyaline layer of the endosperm.
Coleorhiza is a sheath protecting the root of germinating monocots. It connects coleoptile with primary root and is a protective covering enclosing the radicle.
So, the correct answer is 'Scutellum'

A large sheild-shaped catyledon found in some moncotyledonous seeds is

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Aleurone layer

  2. Coleorhiza

  3. Scutellum

  4. Hilum

  5. Coleoptile

Show answer
Correct Option: C
Explanation:

A. Aleurone layer- In monocotyledonous endospermic seed, endosperm is surrounded by a special one- cell thick layer, called aleurone layer. The cells of aleurone layer are filled with proteinaceous aleurone grains which play an important role at the time of germination.

B. Coleorhiza- Protective sheath of radicle.

C. Scutellum- In monocotyledonous endospermic seed, the embryo consists of an upper shield shaped scutellum wich is actually a reduced cotyledon. The scutellum is closely pressed against the endosperm and helps in the translocation of nutrients from endosperm to the growing embryo at the time of germination and seedling growth.

D. Hilum- It is the point of attachment of the body of the ovule with the funiculus.

E. Coleoptile- Protective sheath of plumule.
So, the correct answer is 'Scutellum'.

Monocotyledonous seeds possess a single cotyledon which is represented by

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Tegman

  2. Endosperm

  3. Scutellum

  4. Aleurone

Show answer
Correct Option: C
Explanation:

In monocots, particularly the grasses where the fruit is a caryopsis, the cotyledon forms a shield like structure the scutellum. Its function is to digest the endosperm and direct the nutrients to the developing embryo. It does not form green leaf like structures as in dicots.

So, the correct answer is 'Scutellum'

Match the followings and choose correct option.


   Group A    Group B
 A.  Aleurone layer  (i).  Without fertilisation
 B.  Parthenocarpic fruit  (ii).  Nutrition
 C.  Ovule  (iii).  Double fertilisation
 D.  Endosperm   (iv).  Seed

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. A-(i), B-(ii), C-(iii), D-(iv)

  2. A-(ii), B-(i), C-(iv), D-(iii)

  3. A-(iv), B-(ii), C-(i), D-(iii)

  4. A-(ii), B-(iv), C-(i), D-(iii)

Show answer
Correct Option: B
Explanation:

Aleurone layer - a layer of protein storage cells,  present in cereal, maize seed, and is a  form of reserved food material.

Parthenocarpic fruit - when the ovary is stimulated to form fruit without fertilization then it is a parthenocarpic fruit
Example, seed less grapes, water melon
Ovule: contains embryo sac with egg cell, synergids, polar nuclei and antipodal cells. In angiosperms the pollen tube releases two male gametes, of which one fuses with the egg cell to form the zygote while the other fuses with polar nuclei to form triploid  PEN 
Endosperm- PEN develops into endosperm which provides nutrients to the developing embryo.
So, the correct answer is 'A- (iv), B-(i), C-(iii), D - (ii)'

In monocots, sieve tube first appears in

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Stem

  2. Leaves

  3. Roots

  4. Endosperm

Show answer
Correct Option: B
Explanation:

In monocots, sieve tube first appears in leaves. The main function of the sieve tube is transport of carbohydrates, primarily sucrose, in the plant (e.g., from the leaves to the fruits and roots). Unlike the water-conducting xylem vessel elements that are dead when mature, sieve elements are living cells. They are unique in lacking a nucleus at maturity.

Therefore, the correct answer is option B.

Which of the following group does not represent monocot Apricot mango, guava, apple, coconut, strawberry

biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

  1. Apricot, mango, Guava

  2. Apple, strawberry, coconut

  3. Coconut, apple, cashewnut

  4. Coconut, strawberry, mango

Show answer
Correct Option: A