Biology · Environmental Studies

Plant Reproduction and Germination

835 Questions

Plant reproduction and germination involve seed structure, cotyledon function, and dispersal mechanisms. These core botany concepts frequently appear in general science sections. Practice these questions to ensure better retention.

Seed germination typesSeed dispersal mechanismsCotyledons and albuminous seedsCryptogamic plantsPhanerogams reproduction

Plant Reproduction and Germination Questions

Multiple choice

Which of the following plants shows hypogeal germination?

  1. Castor

  2. Bean

  3. Cotton

  4. Sonneratia

  5. Maize
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

During early stages of germination, the epicotyl elongates, the cotyledons remain below the soil and the plumule is carried at the tip of the elongated epicotyl. This is called hypogeal germination. For example, pea, gram, maize, rice, etc.

Multiple choice

Winnowing is the process of

  1. loosening the soil

  2. keeping the field barren

  3. separating grains from the chaff

  4. uprooting weeds from the crop

  5. treating seeds prior to sowing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The process of separating grains from the chaff is called winnowing.

Multiple choice

In gymnosperms, the seeds are naked because they lack

  1. integument

  2. perianth

  3. pericarp

  4. nucellus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gymnosperm seeds are naked because they lack a pericarp (fruit wall). Unlike angiosperms where ovules develop into seeds enclosed within a fruit, gymnosperm ovules are borne on scales of cones that remain open after fertilization, exposing the seeds.

Multiple choice

Why is vivipary an undesirable character for annual crop plants?

  1. It reduces the vigour of the plant.

  2. The seeds exhibit long dormancy.

  3. It adversely affects the fertility of the plant.

  4. The seeds cannot be stored under normal conditions for the next season.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Vivipary is the condition whereby the embryo (the young plant within the seed) grows first to break through the seed coat then out of the fruit wall while still attached to the parent plant. It is an undesirable character for annual crop plants as the seeds cannot be stored under normal conditions for the next season.

Multiple choice

What is the main function of cotyledons in a seed?

  1. It provides protection to the radicle.

  2. It stores food material.

  3. It supplies food to the young embryo.

  4. It helps in seed germination.

  5. It provides protection to the plumule.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The main function of cotyledons in a seed is that it helps in seed germination.

Multiple choice

__________ is unique to the seed of monocot.

  1. Coleoptiles

  2. Radicle

  3. Seed coat

  4. Endosperm

  5. Hilum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Coleoptiles is unique to the seed of monocot. Coleoptile is the pointed protective sheath covering the emerging shoot in monocotyledons such as oats and grasses.

Multiple choice

Which of the following statements is NOT correct regarding the Hypocotyl hook?

  1. It develops below the attachment of the cotyledons.

  2. It straightens when exposed to light.

  3. It is the first structure to emerge from a dicot seed.

  4. It precedes the cotyledons and shoot apex up through the soil.

  5. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hypocotyl hook is not the first structure to emerge from a dicot seed. Hence,  this statement is wrong.