Tag: structure of a bisexual flower

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Questions Related to structure of a bisexual flower

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

Structure equivalent to perianth is

  1. Superior palea

  2. Inferior palea

  3. Glumes

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

The term perianth is used to refer to the condition when the calyx and corolla are not differentiated. In grasses, the similar condition is seen by the presence of lodicules, that are situated below the ovary. 

A. & B. Palea are bracts present in spikelets of the grasses.
C. Glumes are the involucre in the inflorescence of a spike.
D. Lodicules are the covering present below the ovary, similar to the perianth.
Hence, the correct answer is 'Lodicules'

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

Individual components of perianth are called ______.

  1. Sepals

  2. Petals

  3. Tepals

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

The whorl perianth represents undifferentiated calyx and corolla. Its individual units are called tepals. Tepals can be petaloid if coloured bright or sepaloid if green.

A. Sepals are the units of the calyx.
B. Petals are the units of the corolla.
C. Tepals are the units of perianth.
D. Bracts form a cover exterior to the calyx.
Hence, the correct answer is 'Tepals'.

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

Achalmydeous flower occurs in

  1. Sunflower

  2. Betel

  3. Onion

  4. <p>Avena</p>
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Achlamydeous condition refers to the absence of both the calyx and the corolla. Instead, there is a presence of the whorl called perianth. This type of condition is seen in betel, belonging to the family Piperaceae.

A. Sunflower shows calyx as pappus and corolla.
B. Betel is achlamydeous.
C. Onion has perianth arranged in two whorls.
D. Avena has the lemma and palea.
Hence, the correct answer is 'Betel'.

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

Involucre is composed of

  1. Bracts

  2. Extra calyx

  3. Bracteoles

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

Involucre refers to the group of bracts that are arranged in one or more whorls around the flowers. Example, sunflower.

A. Bracts make up the involucre.
B. Epicalyx makes up the extra calyx, present exterior to the calyx, example, Cotton.
C. Bracteoles make up the epicalyx.
D. Scale leaves make up the scaly bracts at the base of each floret in family Asteraceae.
Hence, the correct answer is 'Bracts'

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

Read the statements carefully :
a) Flowers are morphological and embryological marvel and the site of sexual reproduction
b) The proximal end of the filament is attached to the thalamus or the petal of the flower
c) The number and length of stamens are variable in flowers of different species
d) stamen attached to the petal is epipetalous
How many above statements are correct

  1. One

  2. Two

  3. Three

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

Flowers are the site of sexual reproduction in a flowering plant. They are a morphological and embryological marvel. The proximal end of the filament of the stamen is attached to the thalamus or the petal of the flower. The number and length of stamens are variable in flowers of different species. The number varies from 3 to 10 in different species. Also, the size of stamens varies largely in different species. Stamen attached to the petal is called as epipetalous. For example, Brinjal.

Thus, the correct answer is option D.

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

Bougainvillea flower is an example of

  1. incomplete flower

  2. having a large nectary

  3. water pollination

  4. large colorful bracts
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bougainvillea flower of the plant is generally white and in which each cluster of 3 flowers is surrounded by 3 or 6 bracts with the bright colors associated with the plant, including purple, magenta, red, pink, white, or yellow, orange,

So, the correct answer is 'large colorful bracts'

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

Perianth is bilabiate personate is

  1. Antirrhinum

  2. Salvia

  3. Peristrophe

  4. Ocimum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Antirrhinum is a genus of plants commonly known as dragon flowers or snapdragons because of the group (Saerorhinum). The genus is characterized by personate flowers with an inferior gibbous corolla. Cultivars have showy white, crimson, or yellow bilabiate flowers Corolla is blipped. The two lips may be open (Bilabiate and Ringent, e.g., Salvia) or closed (Bilabiate and Personate, e.g., Antirrhinum). The mouth is closed by a projection of the lower lip called palate.
So the correct answer is 'Antirrhinum'.
Multiple choice biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

Climber plant with zygomoprhic flower and diadelphous stemen is

  1. Tomato

  2. Soybean

  3. Dracaena

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

Tomato belongs to Family Soianaceae. It is a climber. It has actinornorphic flower. 

Soybean belongs to Family Fabaceae. It s a climber. It has zygomorphic flower. It has Diadelphous stamen. 
Dracaena belongs to Family Liliaceae. It is a shrub. It has actinomorphic flower. 
Mustard belongs to Family Brassicaceae. It is a herb. It has actinornorphic flower. It has Tetradynamous stamen.
Thus, the correct answer is option B.

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

A flower with sepals, petals, stamens and carpels is said to be

  1. complete

  2. incomplete

  3. actinomorphic

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

A flower having sepals, petals, stamens, and pistils are complete; lacking one or more of such structures, it is said to be incomplete. Stamens and pistils are not present together in all flowers. Rose, hibiscus, Oxalis, are a few examples

So, the correct option is, 'complete'.