Home
Class 12
BIOLOGY
Following are the differences between mo...

Following are the differences between monocot and dicot stem . Which ones are correct ?
`{:(,"Phylloclade","Phyllode","Cladode"),((i),"Opuntia","Asparagus","Acacia"),((ii),"Xylem","Exarch","Endarch"),((iii),"Pith","Absent","Present"),((iv),"Bundle sheath","Sclerenchymatous","Parenchymatous"):}`

A

i and ii

B

iii and iv

C

i and iii

D

ii and iv

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the differences between monocot and dicot stems, we will analyze each option provided in the question step by step. ### Step 1: Analyze Phylloclade, Phyllode, and Cladode - **Phylloclade**: This is a stem modification where the stem or branches are flattened and perform photosynthesis. This is found in **Opuntia** (a type of cactus). - **Phyllode**: This is a stem modification that resembles a leaf and is stalk-like. This is found in **Asparagus**. - **Cladode**: Similar to phylloclades, these are flattened stems that also perform photosynthesis and are found in **Acacia**. **Conclusion for Step 1**: All three statements regarding phylloclade, phyllode, and cladode are correct. ### Step 2: Analyze Xylem Arrangement - In monocot stems, the xylem is typically **endarch**, meaning that the protoxylem is located towards the center and the metaxylem is towards the periphery. - In dicot stems, the xylem is **exarch**, where the protoxylem is located towards the outside and the metaxylem is towards the center. **Conclusion for Step 2**: The pairing of xylem arrangements is incorrect. ### Step 3: Analyze Pith Presence - In monocot stems, the pith is generally **absent**. - In dicot stems, the pith is **present** and located at the center of the stem. **Conclusion for Step 3**: The statement regarding pith is correct. ### Step 4: Analyze Bundle Sheath Composition - In monocot stems, the bundle sheath is composed of **parenchymatous** cells. - In dicot stems, the bundle sheath is composed of **sclerenchymatous** cells. **Conclusion for Step 4**: The statement regarding the bundle sheath is incorrect. ### Final Conclusion From the analysis: - The correct statements are: 1. Phylloclade, Phyllode, and Cladode (Correct) 2. Xylem arrangement (Incorrect) 3. Pith presence (Correct) 4. Bundle sheath composition (Incorrect) Thus, the correct options are the first and third statements. ### Answer: The correct options are (i) and (iii). ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Match the columns and choose the correct option {:(,I,,II),((a),"Bulliform cells",(1),"intitaion"),((b),"peicycle",(2),"Root"),((c),"Endarch xylem",(3),"Grasses"),((d),"Exarch Xylem",(4),"Dicot leaf"),((e)"Bundle sheath cells",(5),"stem "):}

Go through the following matches {:((i),"Primary diocot stem",-"Sclerenchymatous hypodermis"),((ii),"Monocot stem",-"Parenchymatous pit"),((iii),"Dicot leaf",-"Praenchymatous pith"),((iv),"Monocot leaf",-"Bulliform cells"):} Which or the following

Go through the following matches {:((i),"Monocot stem",-"Sclerenchymatous hypodermis"),((ii),"Primary dicot root",-"Parenchymatous medullary rays"),((iii),"Primary dicot root",-"Parenchymatous conjunctive tissue"),((iv),"Monocot root",-"Parenchymatous pericycle"):} Which of the following are correct

Go through the following matches {:((i),"Primary dicot stem",-"Sclerenchymatous and parenchymatous pericycle"),((ii),"Monocot root",-"Transfusion cells"),((ii), "Monocot stem",-"Conjoint, collateral, closed bundles"),((iv),"Primary dicot root",-"Exarch Xylem"):} Which or the following

Which of the following is generally present in dicot stem ? (i) Endodermis (ii) Pericycle (iii) Medullary ray (iv) Phloem parenchyma (v) pith (vi) Epidermis

Match from the column given below : {:("Parts of Dicot Roots","Consists of "),(a."Epiblema","i. Unicellular root hair"),(b."Casparian strips ","ii. Vascular bundle and pith"),(c."Pericycle","iii.Waxy material suberin "),(d. "Stele","iv.Thick walled parenchymatous cells."):}

which of these characters does/do not apply to vascular bundle of moncot stem. I. conjoint II. Endarch protoxylem III. Open IV. Phloem parenchyma is absent.

Answer the following with reference to the anatomy of dicot stem : (i) Where exactly are the cambial cells located in the vascular bundles? (ii)What is the name given to such a bundle ? (iii) How are the xylem vessels arranged ? (iv) What type of cells constitute the pith ?

Read the following statements with respect to dicot stem and select the right choice . i. The epidermis is covered with a thick layer of cuticle . ii. The cells of endodermis are rich in starch grains. iii. The pericycle is present on the inner side of endodermis and above the phloem in the of semilunar patches of sclerenchyma. iv. The vascular bundles are arranged in a ring .

Give one significant difference between each of the following : (i) Natural and Artifical ecosytems . (ii) Biotic and Abiotic components . (iii) Primary productivity and Secondary productivity . (iv) Detritus and Litter .