Biology · Environmental Studies

Plant Reproduction and Germination

892 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 seeds - structure and germination germination seed germination the flower

Mark the correct match.

  1. Epigeal germination- Bean

  2. Hypogeal germination- Maize

  3. Bisexual flower- Mustard

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In beans germination takes place above the ground and maize below the ground, bisexual flowers were seen in mustard.

So the correct option is 'All of the above.'

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

Monocot seed generally shows

  1. Epigeal germination

  2. Hypogeal germination

  3. Both A and B

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

In hypogeal germination, the cotyledons do not come out of the soil surface. In such seeds, the epicotyl (i.e., part of the embryonic axis between plumule and cotyledons) elongates pushing the plumule out of the soil. All monocotyledons show hypogeal germination.

So the correct option is 'Hypogeal germination'.

Multiple choice biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

Male gametes are present in

  1. Anther

  2. Style

  3. Stigma

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

The whorl of the flower are differentiated into two categories essential and non-essential whorl and are consists of 

  1. Stamens or androecium are the male reproductive part and are divided into filament (long slender stalk) and anther (the terminal bilobed structure that produces male gametes).
  2. Carpels or gynoecium are the female reproductive part and produce ovum and is divided into three parts stigma (where pollen grains land), style(that leads pollen tube to the ovary) and ovary that produce ovum(female gamete).
So, the correct answer is 'Anther'

Multiple choice botany diversity in living things and their classification diversity in plants types of nutrition in plants different modes of nutrition in plants

Why vivipary is an undesirable character for annual crop plants?

  1. It reduces is vigour of the plant

  2. It adversely affects the fertility of the plant

  3. The seeds exhibit long dormancy

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

Vivipary is a condition where seeds germinate on the plant. Most of the food crops are annuals and seeds are consumed as food. Therefore, if seeds germinate on the plant they cannot be utilized as food nor can they be stored for the next season. So, the correct answer is 'The seeds cannot be stored under normal conditions for next season'

Multiple choice botany modes of reproduction introduction to flower pre fertilization - plants sexual reproduction in flowering plants the origin of cells and cell division

What is the function of germ pore?

  1. Emergence of radicle

  2. Absorption of water for seed germination

  3. Initiation of pollen tube

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

One or more thin areas present in the exine of pollen grains are known as germ pores. The germ pores are apertures in the exine layer of the pollen grain where the sporopollenin is absent. The germ pore helps in the formation of the pollen tube and the release of the male gametes during fertilisation. There are usually three germ pores in dicots(tricolpate) and one in monocots(monocolpate).

Multiple choice botany modes of reproduction introduction to flower pre fertilization - plants sexual reproduction in flowering plants the origin of cells and cell division

During fertilization male gametes are carried by pollen tube. This is called ________.

  1. Syngamy

  2. Mesogamy

  3. Polygamy

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

Siphonogamy is a condition in plants in which dust tubes are produced for the exchange of the male cells to the eggs. The seed plants are phenogamous, while in the lower plants the male cells ordinarily swim to the eggs. 
So, the correct option is 'Siphonogamy'.

Multiple choice botany modes of reproduction introduction to flower pre fertilization - plants sexual reproduction in flowering plants the origin of cells and cell division

Fertilization which involves carrying male gametes by pollen tube is called

  1. Porogamy

  2. Siphonogamy

  3. Chalazogamy

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

The process fertilization accomplished by means of pollen tube in which the transfer of male gametes to the female gametes takes place.

So the correct option is 'Siphonogamy'.

Multiple choice botany modes of reproduction introduction to flower pre fertilization - plants sexual reproduction in flowering plants the origin of cells and cell division

Normally how many pollen mother cells are necessary for formation of $400$ seeds.

  1. $200$
  2. $500$
  3. $100$
  4. $400$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Each seed requires one male gamete and one female gamete. One pollen mother cell (PMC) produces 4 microspores, each forming a pollen grain with 2 male gametes. However, only one pollen grain is needed per seed. Thus, 400 seeds require 400 pollen grains. Since 1 PMC produces 4 microspores, 400/4 = 100 PMCs are needed.

Multiple choice evs life in water aquatic plant adaptations pollination through water aquatic adaptation extreme adaptations

________ seed in which reserve food is present in the perisperm.

  1. <p>Nymphaea</p>

  2. Coconut

  3. Onion

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

A. Nymphaea- Reserve food material in perisperm (Persistant nucellus). Perisperm occurs in the seeds of black pepper, coffee, castor, cardamom, Nymphaea. It is diploid.

B. Coconut- Reserve food material in endosperm.

C. Onion- Reserve food material in endosperm

D. Litchi- Reserve food material in cotyledons.

So, the correct answer is 'Nymphaea'.

Multiple choice development of plants plant growth growth and development plant growth and development biology

Germination of some seeds is promoted by

  1. Green light

  2. Red light

  3. Far-red light

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

Seed germination requires sufficient amount of P$ _pr$fr. P$ _r$ is synthesized by germinating seeds and is converted to P$ _pr$ when exposed to red light. However, when  seeds are exposed to far-red light, they will not germinate as P$ _r$ is converted to P$ _r$.

Thus, the correct answer is option B.

Multiple choice development of plants plant growth growth and development plant growth and development biology

State whether the following statements are true or false.
In addition to regulating flowering in some plants, phytochrome also promotes seed germination and can inhibit stem elongation.

  1. True

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

Phytochromes are the hormones that are light dependent and are bluish green pigments that are involved in the developmental processes. They are light dependent and activates the inactivated form of phytochrome. They sometimes are useful in seed germination and cell elongation but stops the elongation of the stem when getting too exposed to far-red light and get inactivated.

So, the correct statement is 'True'.