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Published on: 01/08/2018
Some of the important questions are prepared from this Living World of Plants: Plant Physiology. In this question paper, questions are prepared from the book back and creative question.
Download Tamil Nadu 9th 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.
Chlorophyll in a leaf is required for __________.
photosynthesis
transpiration
tropic movement
nastic movement
2.
The non-directional movement of a plant part in response to temperature is called ________.
thermotropism
Thermonasty
chemotropism
thigmonasty
3.
Transpiration is best defined as _________
loss of water by the plant
evaporation of water from the aerial surfaces from the plant
loss of water in the form of water vapour from the underground parts of the plant body
release of water from the plant into the atmosphere
4.
The chemical reaction occurs during photosynthesis is ________.
CO2 is reduced and water is oxidized
water is reduced and CO2 is oxidized
both CO2 and water are oxidized
both CO2 and water are produced
5.
The tropic movement that helps the climbing vines to find a suitable support is ________.
phototropism
geotropism
thigmotropism
chemotropism
6.
The raw materials for photosynthesis are _________ and _______.
7.
When the leaves of a sensitive plant are touched with a finger, they fold up and when light fades at dusk the petals of a Dandelion flower close. These two plants show ____ and_____ movements.
8.
Photosynthesis : ____________ Transpiration : Stomata
9.
Hydrotropism : Response towards water Phototropism : ___________
10.
__________ is positively hydrotropic as well as positively geotropic.
11.
Give an example for micronutrients.
12.
What is chlorophyll?
13.
Which gas is evolved during photosynthesis?
14.
Fill in the blanks:
6CO2+________\(\overset { Sunlight }{ \underset { Chlorophyll }{ \longrightarrow } } \) _____ +6H2O+6O2 \(\uparrow\)
15.
Give an example for negative hydrotropism.
16.
Which flowering plant shows photonasty just opposite to that of Dandelion?
17.
What is the other name for thigmonasty?
18.
Name the movement seen in Pneumatophores of Avicennia
19.
Study the pictures below and then complete the table by putting a plus (+) if the shoot or root grows towards the stimulus and a minus (-) if it grows away from it.
| Stimulus | Light | Gravity |
|---|---|---|
| Shoot | + | - |
| Root | ? | + |
20.
Give the technical terms for the following:
a) Growth dependent movement in plants.
b) Growth independent movement in plants.
21.
Name the minute openings seen on the lower surface of the leaf.
22.
What is the end product of photosynthesis?
23.
Observe the given picture.
a) Identify this plant. What type of special movement is shown by this plant?
b) What are the other movements seen in this plant?
24.
Write the scientific terms used to represent the following:
a) Growing of roots towards the gravity.
b) Bending of roots towards the water.
25.
Give an example for a plant whose leaf shows a mesmerizing movement.
26.
Design an experiment to demonstrate hydrotropism.
27.
Plants lose water when the stomata on leaves are closed.
28.
The petals of moon flower open up in morning and closes in the evening. This is called photonasty.
29.
When the leaves of Mimosa pudica plant are touched with the finger, they fold up quickly. This is an example of thigmonasty.
1.
(a)
photosynthesis
2.
(b)
Thermonasty
3.
(b)
evaporation of water from the aerial surfaces from the plant
4.
(a)
CO2 is reduced and water is oxidized
5.
(c)
thigmotropism
6.
( )
CO2, H2O and Chlorophyll & Light
7.
( )
Thigmonasty ; Photonasty
8.
( )
9.
( )
response towards sunlight
10.
( )
Root
11.
Copper, Boron, Silicon, Zinc, Molybdenum, Iron, Mn, Chlorine, and Cobalt
12.
Cholorophll is a green pigment present in leaves
13.
Oxygen
14.
15.
Rhizophora
16.
Moon flower (or) Ipomoea alba shows photonasty just opposite to that of Dandelion.
17.
The other for thigmonasty is seismonasty
18.
Negative geotropism is seen in the pneumatophores of avicennia.
19.
'-'
20.
(a) Tropic movement
(b) Nastic movement
21.
Stomata
22.
Glucose.
23.
(a) The plant is identified as Mimosa pudica.
Special movement: Just a casual touch is enough to make the Mimosa pudica leaves fold up and droop. (Seismonasty or Thigmonasty).
Rapid plant movement: It shows nyctinastic movement. The foliage closes during darkness and reopens in light.
24.
Positive Geotropism
Positive Hydrotropism
25.
Non-directional response of a plants part to stimulus is known as nastic movement.
26.
Materials required: Glass trough, sand, flower pot, plugged at the bottom, pea or bean seeds and water.
Procedure:
1. A glass trough is taken and is filled with sand. A flower pot containing water, plugged at the bottom is kept at the centre of the glass trough.
2. Soaked pea or bean seeds are placed around the pot in the sand, what do we observe after 6 or 7 days?
Observation: It will be observed that radicle has grown towards the pot and moisture instead of growing vertically downward.
Inference: It proves that primary root is positively hydrotropic.
27.
(b)
28.
(b)
29.
(a)
9th Standard Syllabus & Materials
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Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
