Tag: seeds - structure and germination

Quizzes (7) Questions (152)

Questions Related to seeds - structure and germination

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

A monocot showing reticulate venation is __________.

  1. Bombusa

  2. Smilax

  3. Callophyllum

  4. Ginkgo
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

An endospermic seed is

  1. Pea

  2. Gram

  3. Castor

  4. Bean
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice biology seeds - structure and germination dicot seed monocot seed structure of monocot and dicot seed

In cereal grain, single cotyledon is represented by

  1. Coleoptile

  2. Coleorhiza

  3. Scutellum

  4. Prophyll
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

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

  1. Coleoptile

  2. Scutellum

  3. Aleurone layer

  4. Coleorhiza
Reveal answer Fill a bubble to check yourself
B Correct answer
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'

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

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

  1. Aleurone layer

  2. Coleorhiza

  3. Scutellum

  4. Hilum

  5. Coleoptile
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Monocotyledonous seeds possess a single cotyledon which is represented by

  1. Tegman

  2. Endosperm

  3. Scutellum

  4. Aleurone
Reveal answer Fill a bubble to check yourself
C Correct answer
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'

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

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

  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)
Reveal answer Fill a bubble to check yourself
B Correct answer
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)'

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

In monocots, sieve tube first appears in

  1. Stem

  2. Leaves

  3. Roots

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

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

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

  1. Apricot, mango, Guava

  2. Apple, strawberry, coconut

  3. Coconut, apple, cashewnut

  4. Coconut, strawberry, mango
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Apricot, mango, and guava are all dicots (have two cotyledons), while the question asks which group does NOT represent monocots. Monocots include coconut, while dicots include apricot, mango, and guava.