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 biology biological diversity species, communities and ecosystems kingdom fungi monera, protista, fungi

Cotyledon is also known as

  1. Seed leaves

  2. Endosperm

  3. Embryo

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The cotyledons are referred to as seed leaves. It is because they act as the leaves of the seed during the process of germination. This in the sense that, as the leaves of plants provide food for the plants, so does the cotyledons provide food for the germinating plant. This is possible because the cotyledons store food necessary used during this process. So, the correct option is 'Seed leaves'.
Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods other modes of vegetative propagation introduction to reproduction vegetative reproduction

This is an example of a very old viable seed excavated from Arctic Tundra. The seed germinated and flowered after an estimated record of $10,000$ years of dormancy. It is?

  1. Victoria

  2. Lupinus arcticus

  3. Phoenix dactylifera

  4. Strobilanthus kunthiana
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are several records of very old yet viable seeds. The oldest one is of a lupine(Lupnius arcticus) excavated from Arctic Tundra. Seeds of Lupinus arcticus, atleast $10,000$ years old were found in lemming burrows deeply buried in permanently frozen silt of Pleistocene age in ungladated central Yuzon. They readily germinated in the laboratory and have since grown into normal healthy plants.

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods other modes of vegetative propagation introduction to reproduction vegetative reproduction

Parachute type of mechanism of seed dispersal is found in _____________.

  1. Pea/Leguminosae

  2. Mustard/Cruciferae

  3. Cotton/Malvaceae

  4. Taraxacum/Compositae
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Taraxacum (dandelion) seeds possess a pappus, which is a tuft of hairs that acts like a parachute to facilitate wind dispersal.

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods other modes of vegetative propagation introduction to reproduction vegetative reproduction

Which of the following pairs are correctly matched?
a. Tegmen: Part of seed coat which actually is the dried up inner integument.
b. Caruncile- A spongy outgrowth of helium and absorbs water
c. Endothelrum: Inner epidermal layer of integument in unitegmic ovules and functions similar to another tapetum
d. Epithelium: Tissue of the scutellum abutting the endosperm; glandular in nature and secretes enzymes.
Select the correct answer.

  1. $1, 2$ and $3$
  2. $1, 3$ and $4$
  3. $1, 2, 3$ and $4$
  4. $2$ and $4$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods other modes of vegetative propagation introduction to reproduction vegetative reproduction

After-ripening dormancy has been reported in the seed.

  1. Fraxinus excelsior

  2. Parkinsoma aculeata

  3. Pistacia lentiscus

  4. Trigonella indica
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

After-ripening is a period of dormancy where seeds require time after harvest to become capable of germination. Fraxinus excelsior (European ash) is a well-documented example of seeds requiring this process.

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

The seeds of ............ fruit are dry and dispersed by explosion due to the touch of our hands. 

  1. Cucumber

  2. Balsam

  3. Xanthium

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

  1. Cucumber needs insects like bees or other insects to disperse their seeds.
  2. Balsam seeds use explosion mechanism for seed dispersal.T he fruits are dry and light and easily ruptured even touch by hands.
  3. Xanthium also uses animals for seed dispersal the seed stuck to the body of animals and are very tough to remove.
  4. Calotropis widely use bees as the carrier for the dispersal of seeds.
So the correct option is  "Balsam".

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

Moringa (drum stick) seeds have .............. that aid in their dispersal.

  1. Wings

  2. Pappus

  3. Hairy tuft

  4. Thorns
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The seeds or fruits that are dispersed by wind generally are small and light. However, there are certain other adaptions also seen in it. Moringa (drumstick) seeds have wing-like structures that aid in their dispersal. Other seeds which have similar structure are Cinchona and Pinus. Thus, the correct answer is option A.

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

The _________ seeds are dispersed by birds which consume the fruit.

  1. Dandelion

  2. Coconut

  3. Pipal

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

Pipal tree is the dwelling place of birds. The birds consuming the fruit digest the freshly part and eject the undigested seed along with the undigested matter.


Hence, the correct option is $\text{C}$

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

Dispersal of seed in Opium or Poppy/Argemone occurs by

  1. Explosive mechanism

  2. Parachute mechanism

  3. Censer mechanism

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

Dispersal of seeds in poppy occurs by censer mechanism. In this mechanism, the seeds are scattered after dehiscence of fruit occur when it is shaken by the wind. 

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

The seeds of poppy are dispersed by

  1. Wind

  2. Animals

  3. Water

  4. Explosion mechanism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In pollination, pollinators play a major role and different plants adopt different methods to pollinate themselves.

  1. By wind also called anemophily and is used by around 19% of plants. Ex poppy and palm.
  2. By animals also called zoophily in which various animals mainly insects help in pollination and get a reward for this. Majority of plant use this method around 80%.ex Sunflower (by bees), potato (by bumblebees).
  3. By water also called as hydrophily and is not used as much only 0.4 % of plant favored it. Ex Vallisneria.
  4. Explosion mechanism occurs when the triggering agent come in contact and is a violent explosion in which either only anther or both anther and stigma burst to release pollen. Ex Lamiaceae family.
So the correct option is "Wind".