Tag: vegetative reproduction

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Questions Related to vegetative reproduction

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

Pappus occurs in compositae for

  1. Air pollination

  2. Air dispersal

  3. Insect pollination

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

The pappus in Compositae is a modified calyx that forms a parachute-like structure, specifically designed to catch the wind and aid in the dispersal of seeds over distances.

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 followig seed travels only short distance?

  1. Mango

  2. Cotton

  3. Neem

  4. Maple
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Wind dispersal of seeds do not ensure a coverage of larger distance and it also depends upon the morphology of seed as well. Maple seeds are samaras that mean they have a wing like structure and is also called wind seed but is not able to cover a great distance as it does not blow with the wind but flutter on the ground.

So, the correct option is 'Maple'

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

Aril is present in _____________.

  1. Bitter gourd

  2. Cotton

  3. Litchi

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

An aril is a specialized fleshy outgrowth from the seed stalk that covers or partly covers the seed. Among the given options, litchi is well known for its prominent, edible fleshy aril. Bitter gourd possesses an aril as well, but litchi is the classic textbook example.

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

In lettuce, red light is most effective in breaking seed dormancy because it.

  1. Stimulates water absorption

  2. Reverses inhibitory effect of far-red light

  3. Enhances respiratory rate

  4. Breaks down ABA
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Red light promotes germination in photoblastic seeds like lettuce by converting inactive phytochrome (Pr) into its active form (Pfr), which triggers germination. Far-red light converts Pfr back to Pr, inhibiting germination. Thus, red light breaks seed dormancy primarily by reversing the inhibitory effect of far-red light.

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
C Correct answer
Explanation

All four statements accurately describe seed and ovule structures. Tegmen is the inner seed coat from the inner integument, caruncle is a spongy outgrowth near the micropyle, endothelium is the nutritive inner epidermal layer in unitegmic ovules, and epithelium is the specialized absorptive tissue of the scutellum.

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.