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 botany plant biology introduction to angiosperms phanerogams angiosperms

Which among the following is the correct definition of monocots?

  1. Plants having single cotyledons in the seed

  2. Plants having two cotyledons in the seed

  3. Plants having three cotyledons in the seed

  4. Plant without seeds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The angiosperms are divided into two groups on the basis of the number of cotyledons present in the seed. 
  • The plants with seeds having single cotyledons are known as monocots. The plants with seeds having two cotyledons are known as dicots.
Multiple choice botany plant biology introduction to angiosperms phanerogams angiosperms

Angiosperms have____________

  1. Naked seeds

  2. Enclosed seeds

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Subkingdom phanerogams include two divisions, gymnosperms and angiosperms.
Gymnosperms have naked seed whereas angiosperms have seeds enclosed within a fruit. 
Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Why seed dispersal is important?

  1. Survival of plant

  2. Introduction of plant

  3. Adaptation of plant

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Dispersal of seed is important as if seeds germinate near to parent plants it will increase a lot of competition for air, water, and food as well. 
  • If competition increases it will lead to the death of the species and dispersal also leads to exposure to a new environment that helps in adaptation and evolution.

So, the correct option is 'Survival of plant'.

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Seeds tarvel with water is filled with

  1. Water

  2. Air

  3. Protein

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Seeds that travel in water is modified certain mechanism that make them light and filled with air so that they are able to travel a long distance and reach to places that are far from the parents. Its best example is the modification of mesocarp of coconut that helps it in hydrochory and able it to float a long distance.

So, the correct option is 'Air'

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

The bryophyllum bud produces new plants in the presence of 

  1. Low humidity

  2. Moisture

  3. High humidity

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plant like Bryophyllum buds grow in the margins of leaves. When a leaf of this plant falls on a moist soil, each bud can give rise to a new plant. So the correct option is 'Moisture'.

Multiple choice botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

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
  • Parachute mechanism of fruit and seed dispersal is due to a structure called pappus. 
  • Pappus is the Calyx. Pappus or fruit and seed dispersal mechanism is a modification process and this process is known as Calyx. Calyxes are the protective shield of the flower and they can protect the reproduction system of the flower. They help the flower to produce seeds. 
  • Parachute mechanism is characteristic of family Compositae.
  • Hence Parachute type of mechanism of seed dispersal is found in Taraxacum/ Compositae.
  • So, the correct answer is 'Taraxacum/ Compositae'.
Multiple choice botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

Dispersal of seed in Opium or poppy or argemone occurs by

  1. Explosive mechanism

  2. Parachute mechanism

  3. Censer mechanism

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

Opium (Papaver somniferum) or argemone seeds are dispersed by the censer mechanism. The capsule has pores near the top through which seeds are shaken out when the plant sways in wind. The censer mechanism is named after its resemblance to a religious incense burner. Explosive mechanism is seen in balsam, parachute mechanism in composites, and cactus mechanism in cacti.

Multiple choice biology chemical coordination in plants abscisic acid fruit plants: structure and function

State whether the following statements are true or false.
Dormancy of plants occurs in relation to abscisic acid.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dormancy is the period when the physiological activities of the plant slow down for some time. Abscisic acid is a stress hormone that is responsible for the protection of plants in drought conditions. They are generally growth inhibitors and are also called as dormants. They are mainly responsible for the bud dormancy at the time of winter season and also cause seed dormancy and protect it from desiccation.

So, the correct statement is 'True'.

Multiple choice gymnosperms pictorial feature of plant kingdom biology

Which one of these does not require external water for fertilization?

  1. Ferns

  2. Algae

  3. Cycads

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

  • Ferns, algae, and bryophytes find water as an essential element for fertilisation to take place. Because they are in need of water for the movement of sperms, etc. Whereas the condition is not similar in the case of Cycas.

Fertilization in Cycas;
  • The pollen tube grows towards the archegonium of the female gametophyte. There, the end of the pollen tube bursts and discharges its contents into the archegonia chamber.
  • The spermatozoids are set free in the archegonia chamber. They swim towards the neck of the archegonium and make their way down to the egg cell. One of the spermatozoids fuses with the egg uncles i.e. oosphere.
Fertilization is thus effected. 
  • The fertilized oosphere is subsequently surrounded by a wall to form oospores (2n).

Multiple choice biology seeds - structure and germination germination seed germination the flower

Seeds are the basis of out agriculture and offer several advantages to angiosperms. Find the odd statement among the following.

  1. Seeds have better adaptive strategies for dispersal

  2. Seeds may have wings for their dispersal

  3. Seeds have sufficient food reserves to nourish immature haploid embryo on germination

  4. Seeds may remain alive for long
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology seeds - structure and germination germination seed germination the flower

In some plants, particularly halophytes, the seeds germinate with fruits while still attached to the parent plant. Identify this phenomenon from the following terms.

  1. Sesimonasty

  2. Vivipary

  3. Monocarpic

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

Vivipary is the phenomenon of germination of seeds inside the fruit while it is still attached to the parent tree. Such adaptation is found in halophytes. Viviparous plants produce seeds that germinate before they detach from the parent. In many mangroves, for instance, the seedling germinates and grows under its own energy while still attached to its parent.