Tag: basics of leaf and flower

Questions Related to basics of leaf and flower

Bisexual flowers which never open, demonstrate

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. Cleistogamy

  2. Allogamy

  3. Autogamy

  4. None of these

Show answer
Correct Option: A
Explanation:

Some plants never open to ensure complete selfpollination. This condition is called cleistogamy e.g., Commelina bengalensis , Oxalis, Viola, etc. The cleistogamous flower are bisexual small, inconspicuous, colourless and do not secrete nectar.

Anthesis means.

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. Growth of pollen tube inside the carpel

  2. Dehiscence of anthers

  3. Opening of floral bud

  4. Emergence of anthers

Show answer
Correct Option: C

An apocarpous flower is found in

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. Caesalpinnia

  2. Ranunculus

  3. Brassica

  4. Datura

Show answer
Correct Option: B
Explanation:

Apocarpous : Gynoecium consisting of two to many free carpels Each carple forms its own pistils, e.g.,  Ranunculus. 

Match the columns and find the correct option.

I II
(a) Pistils fuse together (i) Gametogenesis
(b) Formation of gametes (ii) Pistillate
(c) Hyphae of higher ascomycetes (iii) Syncarpous
(d) Unisexual female flower (iv) Dikaryotic
botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. a-iii, b-i, c-iv, d-ii

  2. a-iv, b-iii, c-i, d-ii

  3. a-ii, b-i, c-iv, d-iii

  4. a-i, b-ii, c-iv, d-iii

Show answer
Correct Option: A
Explanation:
•When the carpels or pistils get fused, they are known as syncarpous.
•Formation of gametes from the diploid cells through meiosis is called gametogenesis.
•Hyphae of higher ascomycetes are dikaryotic because when the hyphae of two opposite strains fuse, karyogamy doesn't occur immediately and a binucleate condition is produced having nuclei from two different strains.
•A unisexual flower that has only female reproductive part is called pistillate.
Hence, the correct match is:
a-iii, b-i, c-iv, d-ii
So, the correct answer is A.

Study of endemism is important to a plant taxonomist because.

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. Of wide distribution of endemics

  2. Endemics have been subjected to major climatic revolutions

  3. Taxonomist is equally concerned with the history of floras

  4. Endemics have not been physiographically isolated

Show answer
Correct Option: A

Consider the following statements with reference to serotaxonomy.
a. The antigen components of plants represent characteristics of taxonomic importance.
b. Both structural and reserve proteins can be used for the classification of plants.
c. Proteins of the same group from different organs are always comparable.
Which of these statements are correct?

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. $1, 2$ and $3$

  2. $1$ and $2$

  3. $2$ and $3$

  4. $1$ and $3$

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Correct Option: A

Which plant part is utilized for extraction of drugs from Adhatoda vasica, Aloe barbadensis and Digitalis purpurea?

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. Flowers

  2. Underground parts

  3. Leaves

  4. Stems

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Correct Option: A

Which one of the following is the modern approach is plant taxonomy?

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. t-RNA analysis

  2. DNA fingerprinting

  3. Numerical taxonomy

  4. r-RNA analysis

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Correct Option: A

Which is a character of castor plant to avoid autogamy?

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. Unisexuality

  2. Porogamy

  3. Protandry

  4. Heterostyly

Show answer
Correct Option: A

Which among the following statements are true for unisexual flowers?
(i) They possess both stamen and pistil.
(ii) They possess either stamen or pistil.
(iii) They exhibit cross pollination.
(iv) Unisexual flowers possessing only stamens cannot produce fruits.

botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

  1. (i) and (iv)

  2. (ii), (iii) and (iv)

  3. (iii) and (iv)

  4. (i), (iii) and (iv)

Show answer
Correct Option: B
Explanation:

In angiosperms flowers can be unisexual having either stamen or pistil; or bisexual having both stamen and pistil in same flower. In both the types of flowers, Pistil bears ovary. Fruit is ripened or matured ovary. After fertilisation ovary undergoes major changes and its wall also thickens to produce a fruit.

Therefore, the correct answer is option B.