Tag: basics of leaf and flower

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

Bisexual flowers which never open, demonstrate

  1. Cleistogamy

  2. Allogamy

  3. Autogamy

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

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
Multiple choice botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

Study of endemism is important to a plant taxonomist because.

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Endemism refers to species restricted to a particular geographic region. Studying endemism helps plant taxonomists understand the historical development, origin, and evolution of floras in specific areas.

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

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?

  1. $1, 2$ and $3$
  2. $1$ and $2$
  3. $2$ and $3$
  4. $1$ and $3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Serotaxonomy uses immunological properties of proteins to classify plants. All three statements regarding antigen components, protein types, and comparability are foundational to this approach.

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

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

  1. Flowers

  2. Underground parts

  3. Leaves

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

Adhatoda vasica (vasaka), Aloe barbadensis (aloe vera), and Digitalis purpurea (foxglove) are all well-known medicinal plants whose active pharmaceutical ingredients are primarily extracted from their leaves.

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

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

  1. t-RNA analysis

  2. DNA fingerprinting

  3. Numerical taxonomy

  4. r-RNA analysis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Numerical taxonomy, which uses mathematical and statistical methods to evaluate observable characteristics and classify organisms, represents a modern computational approach compared to classical systems.

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

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.

  1. (i) and (iv)

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

  3. (iii) and (iv)

  4. (i), (iii) and (iv)
Reveal answer Fill a bubble to check yourself
B Correct answer
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.