Secondary rachis is modified as phyllode in
- Bryophyllum
- Ruscus
- Parkinsonia
- Casuarina
The Correct Option is C
Solution and Explanation
Top Questions on The Leaf
- Given below are two statements:
Statement I: In a dicotyledonous leaf, the adaxial epidermis generally bears more stomata than the abaxial epidermis.
Statement II: In a dicotyledonous leaf, the adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other.
In the light of the above statements, choose the correct answer from the options given below: - Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): Some species of Katydids (or Bushcrickets) resembles with complete leaf or appears to be a part of leaf.
Reasons (R): Katydids show camouflage as a behavioural strategy to avoid predation.
In the light of the above Statements, choose the correct answer from the options given below: - Match List I with List II
List I (Types of Stomata) List II (Family Type) A Anomocytic I Cruciferous type B Anisocytic II Rubiaceous type C Paracytic III Ranunculaceous type D Diacytic IV Caryophyllous type Choose the correct answer from the options given below:
- Study the following statements and select the option with correct statements.
(I) Pulvinus leaf base is present in some leguminous plants.
(II) In Eichhornia the petioles expand, becomes green and synthesise food.
(III) Opposite phyllotaxy is seen in guava. - Hydathodes are meant for :
- UPSEE - 2017
- Biology
- The Leaf
Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Photosynthesis in higher plants
- Match the following column I with column II.
- AIIMS - 2019
- cloning
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- evolution
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
- Gravitation
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Transcription
Concepts Used:
Leaf
A primary function of the leaf is to provide nourishment for a plant. Leaves get this by extracting water from the earth and carbon dioxide from the air with the help of sunshine.
Parts of a leaf
Following are the parts of a leaf:
- The top part of the leaf is the apex or tip that can be round, pointed, and smooth.
- On most leaves, the lamina, or leaf blade, is the broadest part of the leaf.
- A petiole is a leaf that links to the plant stem.
- Stipules, which are little green addendums near the base of the petiole, can also be seen on leaves.
- Most leaves have a midrib that branches out to initiate vascular tissue veins on the sides.
- Margin refers to the leaf's outer border, which varies depending on the plant type.
- At the bottom of the blade, the base is found; it can be flat, heart-shaped, and round.