Tag: basics of leaf and flower

Questions Related to basics of leaf and flower

Which of the following is polygamous ?

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

  1. Wolf

  2. Swan

  3. Deer

  4. Fox

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Correct Option: A

Which of the following statements is incorrect?

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

  1. Hydrophilous flowers contain light and dry pollen grains

  2. In Commelina, seed setting is assured in absence of pollinating agents

  3. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil

  4. Emasculation ensures cross-pollination in bisexual flowers

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Correct Option: A

Keel is characteristic of the flowers of 

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

  1. Bean

  2. Gulmohar

  3. Cassia

  4. Calotropis

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Correct Option: A
Explanation:

In pea and bean, five types of petals are present. The largest petal (standard) overlaps the two lateral petals (wings), which in turn overlap two smallest anterior petals, which are known as keel. 

When a flower can be cut in two equal portion from only one plane it is called?

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

  1. Actinomorphic

  2. Zygomorphic

  3. Symmetrical

  4. Bilateral

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Correct Option: B
Explanation:

Zygomorphic flowers that are bilaterally symmetrical so that they are able to be bisected into similar halves in only one plane, forming mirror images, e.g., Gladiolus flower.

Which among the following statements are true for unisexual flowers?
(a) They possess both stamen and pistil.
(b) They possess either stamen or pistil.
(c) They exhibit cross-pollination.
(d) 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. (a) and (d)

  2. (b), (c) and (d)

  3. (c) and (d)

  4. (a), (c) and (d)

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Correct Option: B
Explanation:

Unisexual flowers have either the male reproductive part (stamens) or female reproductive part (pistil) but never both.
As the flowers contain either the stamen or pistil, the fertilization can take place when the pollen from another flower or plant comes near the pistil. As there will be fusion of male and female gametes from different individuals of the same species, it results in cross-fertilization.
When the ovary (female reproductive part) ripens, it forms the fruit. So, when a plant contains only stamen, female reproductive part, it cannot produce a fruit.
Thus, the correct answer is option (B).

Botanical name of the cauliflower is

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

  1. Brassica oleracea var capitata

  2. Brassica oleracea var. gemmifm

  3. Brassica campestris

  4. Brassica oleracea var. botrytis

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Correct Option: D
Explanation:
The botanical name of cauliflower is Brassica oleracea. It is a biennial plant. It is commonly used as vegetable. The genus Brassica is characterized by zygomorphic flower, capsule fruit. Leaves are alternately arranged. Cruciferae is the other name of this family which means cross size petals.
So, the correct answer is option D.

Tetradynamous stamens and cruciform corolla are characteristic features of

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

  1. Solanum tuberosum

  2. Abelmoschus esculentus

  3. Ochroma lagopus

  4. Brassica campestris

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Correct Option: D
Explanation:

Tetradynamous is a condition of androecium where six stamens are present of which four stamens are longer and are inserted in inner whorl and remaining two are smaller and are inserted in outer whorl. 
Cruciform corolla is a type of corolla containing four free petals arranged in the form of a cross. 
Solanum tuberosum flower contains five fused petals forming a infundibulum form corolla.
Abelmoschus esculentus and Ochroma lagopus belongs to family Malvaceae. Both contain five free petals. 
Brassica campestris flower possess four free petals forming a cruciform corolla (arranged in the form of a cross). 
Therefore, the correct answer is option D.

There are two clusters, each with 3-9 flowers on a node in the axis of opposite leaf and each cluster has a condensed dichasial cyme ending in monochasial cyme and flowers have lever mechanism, it represents 

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

  1. Cyathium

  2. Coenanthium

  3. Verticillaster

  4. Hypanthodium

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Correct Option: C
Explanation:

There are two clusters each with 3-9 flowers on a node in the axis of opposite leaf and each cluster has a condensed dichasial cyme ending in monochasial cyme and flowers have lever mechanism, it represents Verticillaster. A cymose inflorescence arranged in pairs at the nodes, in the manner of a false whorl, is called a verticillaster. A reduced raceme or cyme that grows in the axis of a bract is called a fascicle. A verticillaster is a fascicle with the structure of a dichasium; it is common among the Laminaceae. Many verticillasters with reduced bracts can form a spicate (spike-like) inflorescence that is commonly called a spike.

Oblique ovary is found in

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

  1. Solanaceae

  2. Palmaceae

  3. Poaceae

  4. Liliaceae

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Correct Option: A
Explanation:

Solanaceae is called the 'brinjal family'. It includes about 90 genera and 2000 species.
The gynoecium is bicarpellary, syncarpous, bilocular or tetralocular due to pseudoseptum many ovules on axile placentation. Ovary is superior, obliquely placed.
Thus, the correct answer is option (A), 'Solanaceae.

In cyathium the ratio between female to male flower is

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

  1. One: one

  2. One : Many

  3. Many : One

  4. Many : Many

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Correct Option: B
Explanation:

Cyathium - Here, the inflorescence is highly reduced. It has a cup shaped receptacle formed by the fusion of five bracts. On the surface of this cup, generally a yellow colored nectar secreting gland is present. A single female flower arises from the center of the cup. It is highly reduced and is borne on a long stalk. The multiple male flowers are highly reduced and are produced in a scorpioid manner from the axil of each bract e.g. Euphorbia pulcherrima. 
Therefore, the correct answer is option B.