Tag: seed

Questions Related to seed

In which of the following, multiciliated/multiflagelated
anthropoids are present

biology seed dicot seed structure of monocot and dicot seed the seed

  1. Riccia and Funaria

  2. Pteris and Cycas

  3. Riccia and Cycas

  4. Marchantia and Riccia

Show answer
Correct Option: B
Explanation:

In pt eris antheridum is having (about 32) multiflagellated, coiled (2 - 3 coils) anthropoids or spermatozoids.

X is scar on the seed through which the developing seeds were attached to the fruit; above the X is a small pore called Y.
Identify X and Y and select the correct option.

biology seed dicot seed structure of monocot and dicot seed the seed

  1. X - Micropyle, Y - Hilum

  2. X - Hilum, Y - Micropyle

  3. X - Testa, Y - Tegmen

  4. X - Chalaza, Y - Micropyle

Show answer
Correct Option: B
Explanation:

X - Hilum - it is the point of attachmnet of the ovule to its stalk or the funicle

Y - Micropyle, the pore or the opening of the ovule, where the integuments do not cover the ovule. It is an opening for the entry of the pollen tube during fertilization.
So, the correct answer is (b).

In dicots the most common pollen tetrad is?

biology seed dicot seed structure of monocot and dicot seed the seed

  1. Isobilateral

  2. Tetrahedral

  3. Linear

  4. Decussate

Show answer
Correct Option: B

A dicot plant lacking cotyledons is

biology seed dicot seed structure of monocot and dicot seed the seed

  1. Cuscuta

  2. Santalum

  3. Lodoicea

  4. None of the above

Show answer
Correct Option: A
Explanation:

Cuscuta is a plant whose embryos lack cotyledons. It is called dicot plant because the stem of cuscuta has as dicot structure. 

 In Groundnut, oil is stored in

biology seed dicot seed structure of monocot and dicot seed the seed

  1. Embryo axis

  2. Endosperm

  3. Cotyledons

  4. None of the above

Show answer
Correct Option: C
Explanation:

In groundnut, oil is stored in the seeds cotyledons.  It is a legume plant.  Each seed of groundnut has 2 cotyledons. 

In pea, castor and maize ,the number of cotyledons are:

botany seeds - structure and germination what is a seed? seeds seed

  1. $2,2$ and $1$ respectively

  2. $1,2$ and $2$ respectively

  3. $2,1$ and $2$ respectively

  4. $1,2$ and $1$ respectively

Show answer
Correct Option: A

Coleorhiza and coleoptile are the protective sheaths covering _________ and _________ respectively.

botany seeds - structure and germination what is a seed? seeds seed

  1. Radicle, plumule

  2. Plumule, radicle

  3. Plumule, hypocotyl

  4. Epicotyl, radicle

Show answer
Correct Option: A

A plant bears fruit, has column of vascular tissue and a tap root system, This plant is a/an.

botany seeds - structure and germination what is a seed? seeds seed

  1. Angiosperm and dicot

  2. Gymnosperm and dicot

  3. Angiosperm and monocot

  4. None of the above

Show answer
Correct Option: A
Explanation:

Dicotylodoneae is a group of angiosperms that are characterized by tap root system, vascular tissue present in columns, posses xylem vessels, leaves have reticulate venation, stem with open collateral vascular bundles arranged in a ring and seed are covered by fruits and show secondary growth.

So the correct option is 'Angiosperms and dicot'

Coleoptile and coleorhiza are absent in?

botany seeds - structure and germination what is a seed? seeds seed

  1. Zea mays seed

  2. Triticum turgidum seed

  3. Gram seed

  4. More than one option is correct

Show answer
Correct Option: A

Perisperm differs from endosperm in  

botany seeds - structure and germination what is a seed? seeds seed

  1. Having no reserve food

  2. Being a diploid tissue

  3. Its formation by fusion of secondary nucleus with several sperms

  4. Being a haploid tissue

Show answer
Correct Option: B
Explanation:

Perisperm differs from endosperm in being a diploid tissue. Endosperm is a tissue produced inside the seeds of most flowering plants around the time of fertilization. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. These are typically triploid but can vary widely from diploid. Endosperm that is diploid, resulting from the fusion of a pollen nucleus with one, rather than two, maternal nuclei.They are both nutritive layers in a seed. Perisperm develops from the nucellus of the seed and the endosperm develops when the sperm cell fuses with two haploid polar nuclei (contained in the central cell) in the centre of the embryo sac (or ovule). The resulting cell is triploid (3n). This triploid cell divides through mitosis and forms the endosperm, a nutrient-rich tissue, inside the seed.