Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

Explain the different kinds of modifications of stem.
Asked by Topperlearning User | 11 Jul, 2014, 12:59: PM
answered-by-expert Expert Answer

Modification of stem:

1. Underground stem: Stores food. It also acts as organs of perennation to face conditions unfavourable for growth. Examples: Potato, turmeric

2. Stem tendrils: They develop from axillary buds. They are slender, spirally coiled and help plants to grow. Example: Pumpkins

3. Thorns: Axillary buds get modified into thorns. They are woody, straight and pointed.

They protect plants from animals. Example: Citrus

4. Photosynthetic stem: In arid regions, stems become flat and fleshy. They contain chlorophyll to carry out photosynthesis. Example: Euphorbia

5. Reproductive stems:

In some plants such as Jasmine, a slender lateral branch arises from the base of the main axis. After growing aerially for some time, it arches down to touch the ground.

In plants such as Chrysanthemum, the lateral branches originate from the basal and underground portion of the main stem. It grows horizontally beneath the soil and comes out obliquely upwards to give rise to leafy shoots.

Answered by | 11 Jul, 2014, 02:59: PM
CBSE 11-science - Biology
Asked by gaurithapa288 | 03 Feb, 2021, 10:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by rajesh.rkbgp | 31 Mar, 2020, 05:11: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by saradamahapatra9999 | 11 Jun, 2019, 12:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by samirkumarsarma | 06 May, 2018, 10:06: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by Topperlearning User | 11 Jul, 2014, 12:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by Topperlearning User | 11 Jul, 2014, 12:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by Topperlearning User | 11 Jul, 2014, 12:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by Topperlearning User | 11 Jul, 2014, 12:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by Topperlearning User | 11 Jul, 2014, 12:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Biology
Asked by Topperlearning User | 11 Jul, 2014, 12:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×