7th Standard Syllabus & Materials
7th Standard
Tamilnadu 7th Standard Maths T2 - தகவல் செயலாக்கம் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - தகவல் செயலாக்கம் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set C
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set C
Published on: 03/09/2019
Reproduction and Modification in Plants
Download Tamil Nadu 7th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Climbing roots are seen in ______.
Betel
Black pepper
Both of them
None of them
2.
Asexual reproduction in yeast is _________.
Spore formation
Fragmentation
Pollination
Budding
3.
Vegetative propagation by leaves takes place in _________.
Bryophyllum
Fungi
Virus
Bacteria
4.
What is tendril?
5.
Define – pollination.
6.
Onion and Garlic are example of _______.
7.
Breathing roots are seen in _______ plants.
8.
After fertilization the ovule becomes _________.
9.
Conical shaped root is carrot.
10.
The transfer of pollen to the stigma is known as pollination.
11.
A complete flower has four whorls.
12.
Write notes on phyllode.
13.
Differentiate bisexual flower from unisexual flower?
14.
Write a brief account on pollination.
15.
Identify the four plants shown in the following table. Name the different modifications in each of them.
| Name | Modification |
| Garlic | |
| Turnip | |
| Rose plant | |
| Maize |
16.
Label the picture given below. Parts of a Flower
17.
| Caly x | __ (1)___ | __(2) __ |
| __ (3)__ | petal | attract insects |
| Androecium | __ (4)__ | Male reproductive part |
| __ (5)__ | ___ (6)__ | Female reproductive part |
18.
| Underground stem | __ (1)__ | Ginger |
| __ (2)__ | Runner | __ (3)__ |
| Leaf modification | __ (4)__ | Acacia |
| Root modification | sucking Roots | __ (5)__ |
1.
(c)
Both of them
2.
(d)
Budding
3.
(a)
Bryophyllum
4.
In climbers, the leaf of plant would be modified into elongated structure to help the plants climb efficiently is known as tendril.
5.
The process by which pollen grains reach stigma is called as pollination.
6.
( )
Bulb
7.
( )
avicennia.
8.
( )
seed
9.
True
10.
True
11.
True
12.
In Acacia auriculiformis, petioles expand to form leaf like structure. They carry out the function of leaf (Photosynthesis). This modification is known as phyllode.
13.
| Bisexual flower | Unisexual flower |
| A flower have both androecium and gynoecium is known as bisexual flowers. | A flower with androecium or gynoecium and without either androecium or gynoecium is known as unisexual flowers. |
14.
The process by which pollen grains reach stigma of the flower is called as pollination. Pollination can be classified into two types based on their mode of transmission.
i) Artificial pollination:
The transfer of pollen grains from anther to stigma by manually is called as artificial pollination
ii) Natural Pollination:
1) The transfer of pollen grains from anther to stigma by insect or any other natural sources is called as natural pollination.
2) Pollination can be classified into another two types based on their site of transmission
i) Self pollination:
Pollen grains are transferred from the anther to the stigma of the same flower or to another flower of the same plant is known as self pollination.
ii) Cross pollination:
Pollen grains are transferred from the anther of one flower to the stigma of another flower of the same kind or different plant known as cross pollination.
15.
| S.No | Name | Modification |
| 1. | Garlic | Stem (Bulb) |
| 2. | Turnip | Root (Top shaped root) |
| 3. | Rose plant | Leaf (Tendrils) and Stem (spine) |
| 4. | Maize | Root (Stilt root) |
16.
17.
| Caly x | sepal | protection |
| corolla | petal | attract insects |
| Androecium | stamen | Male reproductive part |
| Gynoecium | Ovary, style, stigma. | Female reproductive part |
18.
| Underground stem | Rhizome | Ginger |
| Sub aerial stem | Runner | Centella |
| Leaf modification | phylloda | Acacia |
| Root modification | sucking Roots | Cuscuta |
7th Standard Syllabus & Materials
7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - அளவைகள் Important Questions And Answers Study Material - QB365 Set C
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - அளவைகள் Important Questions And Answers Study Material - QB365 Set B
Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
