9th Standard Syllabus & Materials
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NEW9th Standard
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Published on: 04/09/2019
Living World of Plants - Plant Physiology
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.
The non-directional movement of a plant part in response to temperature is called ________.
thermotropism
Thermonasty
chemotropism
thigmonasty
2.
The plant part which exhibits negative geotropism is __________.
root
stem
branch
leaves
3.
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
4.
The tropic movement that helps the climbing vines to find a suitable support is ________.
phototropism
geotropism
thigmotropism
chemotropism
5.
A big tree falls in a forest but its roots are still in contact with the soil. The branches of this fallen tree straight up. This happens in response to __________
water and light
water and minerals
gravity and water
light and gravity
6.
When the weather is hot, water evaporates lesser which is due to opening of stomata.
7.
Joseph Priestley devised an experiment to find out that water alone was the cause of the increase in the weight of the plant.
8.
Scientific term used to represent the bending of roots towards water is called geotropism.
9.
Shoot is positively phototropic and negatively geotropic.
10.
The response of a part of plant to the chemical stimulus is called phototropism.
11.
Roots growing downwards away from light
12.
Shoots growing upward
13.
Shoots growing towards the light
14.
Roots growing downwards into soil
15.
Give an example for negative hydrotropism.
16.
Name the minute openings seen on the lower surface of the leaf.
17.
What is the end product of photosynthesis?
18.
Give an example for a plant whose leaf shows a mesmerizing movement.
19.
Design an experiment to demonstrate hydrotropism.
20.
Plants inhale and exhale continuously through the __________.
21.
Plants utilize only _______% of the absorbed water for photosynthesis and the other activities.
22.
Plants take in carbondioxide for photosynthesis but need ___________ for their living.
1.
(b)
Thermonasty
2.
(b)
stem
3.
(a)
CO2 is reduced and water is oxidized
4.
(c)
thigmotropism
5.
(a)
water and light
6.
(b)
7.
(b)
8.
(b)
9.
(a)
10.
(b)
11.
Negative phototropism
12.
Negative geotropism
13.
Positive phototropism.
14.
Positive geotropism
15.
Rhizophora
16.
Stomata
17.
Glucose.
18.
Non-directional response of a plants part to stimulus is known as nastic movement.
19.
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.
20.
( )
Stomata
21.
( )
1
22.
( )
Oxygen
9th Standard Syllabus & Materials
9th Standard
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Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
