Tag: the flower

Questions Related to the flower

Flowers are unisexual in.

biology the flower pollination and its types germination sexual reproduction in plants

  1. Cyathium

  2. Thyrsus

  3. Verticillaster

  4. Cyme

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Correct Option: A
Explanation:

  • A unisexual flower is a flower that possesses either stamens or carpels. Cyathium looks like a single flower. 
  • It has a cup-shaped involucre formed by bracts encloses a single female flower and a number of male flowers.  
  • Thus it has unisexual flowers with each male flower are as a single stamen while a single pistil represents a female flower. 
  • Also, it is a type of cymose inflorescence. Other options are not as unisexual.
  • The correct option is A.

The number of whorls present in a bisexual flower is

biology the flower pollination and its types germination sexual reproduction in plants

  1. One

  2. Three

  3. Two

  4. Four

Show answer
Correct Option: D
Explanation:

A bisexual flower is a flower that contains all the four whorls such as petals, sepals, the male reproductive structure (stamen) and female reproductive structure (pistil). Hence it is also called as a complete or perfect flower. Thus the correct answer is 'Four'.

The flowers are composed of 

biology the flower pollination and its types germination sexual reproduction in plants

  1. Petals, sepals, filament and carpel

  2. Sepals, petals, stamen and pistil

  3. Sepals, petals, anther and pistil

  4. Petals, sepals, ovary and anther

Show answer
Correct Option: B
Explanation:

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

  1. Calyx which is considered as the outermost whorl and its unit is known as sepals and are green in colour helps in protection of flower.
  2. Corolla is the second nonessential unit and is composed of petals and are coloured and helps to attract pollinators.
  3. Stamens or androecium are the male reproductive part and responsible for the production of pollen grains (male gamete).
  4. Carpels, pistil or gynoecium are the female reproductive part and produce ovum (female gamete).

So, the correct option is 'Sepals, petals, stamen, and pistil'.

The female flowers are composed of the 

biology the flower pollination and its types germination sexual reproduction in plants

  1. Pistil, style and ovary

  2. Anther, stigma and filament

  3. Ovary, style and stigma

  4. Ovule, anther and stigma

Show answer
Correct Option: C
Explanation:

Carpels, pistil or gynoecium are the female reproductive part of the flower that consists of a stigma that holds the pollen grains, a style that leads the path of pollen tube and ovary produce ovum (female gamete). The flower that has the only pistil is referred to as female flower.

So, the correct option is 'Ovary, style and stigma'

Choose the correct statement from the following.

biology the flower pollination and its types germination sexual reproduction in plants

  1. Cleistogamous flowers always exhibit autogamy

  2. Chasmogamous flowers always exhibit geitonogamy

  3. Cleistogamous flowers exhibit both autogamy and geitonogamy

  4. Chasmogamous flowers never exhibit autogamy

Show answer
Correct Option: A
Explanation:

Cleistogamous flowers (that do not open at all) always exhibit autogamy, whereas chasmogamous flowers(with exposed anthers and stigma) can exhibit autogamy, geitonogamy or xenogamy.

The male flowers are 

biology the flower pollination and its types germination sexual reproduction in plants

  1. The flowers which contain only the anther

  2. The flowers which contain the stamen

  3. The flowers which contain filament

  4. The flowers which contain only the pistil

Show answer
Correct Option: B
Explanation:

Stamens or androecium are the male reproductive part  contains filament which is aslender stalk and anther is bilobed and responsible for the production of pollen grains (male gamete).The flower with stamens is referred to as male flower.

So the correct option is "The flowers which contain the stamen".

Statement $1$ : Unisexual flowers are either staminate flowers or pistillate flowers.
Statement $2$ : Both monoecious and dioecious plants have unisexual flowers.

biology the flower pollination and its types germination sexual reproduction in plants

  1. Both statement $1$ and $2$ are correct

  2. Statement $1$ is correct but statement $2$ is incorrect

  3. Statement $1$ is incorrect but statement $2$ is correct

  4. Both statement $1$ and $2$ are incorrect

Show answer
Correct Option: B
Explanation:

In flowering plants, the unisexual male flower is staminate, i.e., bearing stamens, while the female flower is pistillate i.e., bearing pistils. In some flowering plants, both, and female may be present on same individual (monoecious) or on separate individuals (dioecious).

So, the correct option is 'Statement 1 is correct but statement 2 is incorrect'.

Consider the following statements and select the option that correctly fills the blanks.

  1. Mucor mucedo is _____ fungi.
  2. China rose plant bears ________ flowers.
  3. Marchantia is a _______ bryophyte.

biology the flower pollination and its types germination sexual reproduction in plants

  1. Homothallic , Bisexual and Dioecious

  2. Heterothallic, Bisexual and Dioecious

  3. Heterothallic, Unisexual and Monoecious

  4. Homothallic and Unisexual and Monoecious

Show answer
Correct Option: A
Explanation:

  1. Mucor mucedo is homothallic (self-compatible ) fungi.
  2. China rose or Hibiscus flower has both stamen and pistil present on the same plant so it bears a bisexual flower.
  3. In Marchantia is a liverwort in which male and female are born on different plants so it is dioecious bryophyte.
So the correct option is  'Homothallic, Bisexual and Dioecious'

If a water soaked seed is pressed, a small drop of water comes out through the ...............

biology the flower pollination and its types germination sexual reproduction in plants seed germination seeds - structure and germination

  1. Stomata

  2. Lenticel

  3. Micopyle

  4. Radicle

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Correct Option: C
Explanation:

When a soaked seed is pressed the water comes out from the pore of the seed which is known as the micropyle.

Stomata and lenticels are not present in the seed.
Radical is a part of the seed which will develop into the roots.
So the correct answer is ' Micropyle'.

Root system grows from

biology the flower pollination and its types germination sexual reproduction in plants seed germination seeds - structure and germination

  1. Embryo of seed

  2. Radicle of embryo

  3. Plumule of embryo

  4. Coleoptile

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Correct Option: B
Explanation:

Roots system develops from the radicle of the embryo because in seed, the radicle grows downward into the soil to absorb water and nutrients from the soil.

So, the correct option is 'Radicle of embryo'.