Tag: seed

Quizzes (7) Questions (64)

Questions Related to seed

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

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

  1. Riccia and Funaria

  2. Pteris and Cycas

  3. Riccia and Cycas

  4. Marchantia and Riccia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

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

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.

  1. X - Micropyle, Y - Hilum

  2. X - Hilum, Y - Micropyle

  3. X - Testa, Y - Tegmen

  4. X - Chalaza, Y - Micropyle
Reveal answer Fill a bubble to check yourself
B Correct answer
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).

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

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

  1. $2,2$ and $1$ respectively
  2. $1,2$ and $2$ respectively
  3. $2,1$ and $2$ respectively
  4. $1,2$ and $1$ respectively
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pea and castor are dicots (2 cotyledons), while maize is a monocot (1 cotyledon). Thus, the sequence is 2, 2, and 1.

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

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

  1. Radicle, plumule

  2. Plumule, radicle

  3. Plumule, hypocotyl

  4. Epicotyl, radicle
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In monocot seeds, the coleorhiza protects the radicle, and the coleoptile protects the plumule during germination.

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

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

  1. Angiosperm and dicot

  2. Gymnosperm and dicot

  3. Angiosperm and monocot

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

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

Coleoptile and coleorhiza are absent in?

  1. Zea mays seed

  2. Triticum turgidum seed

  3. Gram seed

  4. More than one option is correct
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Coleoptile and coleorhiza are protective sheaths found in monocot seeds, covering the plumule and radicle respectively (e.g., maize and wheat). Gram is a dicot seed and therefore lacks these structures, possessing instead typical dicot features like cotyledons and a direct-emerging radicle.

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

Perisperm differs from endosperm in  

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