Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 19 - Plant Physiology [Latest edition]

The tropic movement that helps the climbing vines to find a suitable support is ______.

The chemical reaction occurs during photosynthesis is ______.

The bending of root of a plant in response to water is called ______.

A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The tip part of the seedling bends towards the burning candle. This is an example of ______.

The root of the plant is ______.

1. positively phototropic but negatively geotropic 
2. positively geotropic but negatively phototropic
3. negatively phototropic but positively hydrotropic 
4. negatively hydrotropic but positively phototropic

The non-directional movement of a plant part in response to temperature is called ______.

The shoot system grows upward in response to ______.

______ is positively hydrotropic as well as positively geotropic.

The green pigment present in the plant is ______.

The solar tracking of sunflower in accordance with the path of sun is due to ______.

The response of a plant part towards gravity is ______.

Plants take in carbondioxide for photosynthesis but need ______ for their living.

Match column A with column B.

State whether true or false. If false, correct the statement.

The response of a part of plant to the chemical stimulus is called phototropism.

State whether true or false. If false, correct the statement.

Shoot is positively phototropic and negatively geotropic.

State whether true or false. If false, correct the statement.

When the weather is hot, water evaporates lesser which is due to opening of stomata.

State whether true or false. If false, correct the statement.

Photosynthesis produces glucose and carbon dioxide.

State whether true or false. If false, correct the statement.

Photosynthesis is important in releasing oxygen to keep the atmosphere in balance.

State whether true or false. If false, correct the statement.

Plants lose water when the stomata on leaves are closed.

What is nastic movement?

Name the plant part 

1. Which bends in the direction of gravity but away from the light.
2. Which bends towards light but away from the force of gravity.

Differentiate phototropism from photonasty.

Photosynthesis converts energy X into energy Y.

1. What are X and Y?
2. Green plants are autotrophic in their mode of nutrition. Why?

Define transpiration.

Name the cell that surrounds the stoma.

Give the technical terms for the following:

1. Growth dependent movement in plants. 
2. Growth independent movement in plants.

Explain the movement seen in Pneumatophores of Avicennia.

What is chlorophyll?

Name the part of plant which shows positive geotropism. Why?

What is the difference between movement of flower in sunflower plant and closing of the leaves in the Mimosa pudica?

Suppose you have a rose plant growing in a pot, how will you demonstrate transpiration in it?

Mention the differences between stomatal and lenticular transpiration.

To which directional stimuli do 

1. roots respond
2. shoots respond?

Differentiate between tropic and nastic movements

How will you differentiate the different types of transpiration?

Higher Order Thinking Skill.

There are 3 plants A, B and C. The flowers of A open their petals in bright light during the day but closes when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but closes during the day when there is bright light. The leaves of plant C fold up and droop when touched with fingers or any other solid object.

1. Name the phenomenon shown by the flowers of plant A and B.
2. Name one plant each which behaves like the flowers of plant A and B. 
3. Name the phenomenon exhibited by the leaves of plant C. 
4. Name the plant which behaves like the leaves of plant 'C'?

Higher Order Thinking Skill.

Imagine that student A studied the importance of certain factors in photosynthesis. He took a potted plant and kept it in dark for 24 hours. In the early hours of the next morning, he covered one of the leaves with dark paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.

1. What aspect of photosynthesis was being investigated? 
2. Why was the plant kept in the dark before the experiment? 
3. How will you prove that starch is present in the leaves?
4. Name the raw materials needed for photosynthesis.