Photosynthesis

Photosynthesis

Class Policy

• today's class will be interactive which requires students' active participation.

• Questions will be asked and the students need to respond in the slide itself.

• Some questions will carry points; others will not.

• Therefore, remain focussed till the end of the class.

Poll

Are you all ready for today's class?

• Yes

• No

• Please explain again...

Multiple Choice

The process of preparation of food by green plants is called _________

• Cooking

• Respiration

• Photosynthesis

• Transpiration

Multiple Choice

The part of the plant that prepares food (in the options given) is ______

• Flower

• Root

• Fruit

• Leaf

Multiple Choice

Which of these is NOT a raw material of photosynthesis?

• Oxygen

• Carbon dioxide

• Water

• Sunlight

Multiple Choice

_________ and _________ are produced during the process of photosynthesis.

• Water, carbon dioxide

• Sugar, oxygen

• Oxygen, carbon dioxide

• Water, oxygen

In today's class, we will learn about...

• Stomata: Structure, position and function

• Experiment to show that light is necessary for photosynthesis.

• Experiment to show that chlorophyll is necessary for photosynthesis.

Fill in the Blanks

Fill in the blanks:

The minute openings present on the surface of leaves are called

Multiple Choice

During the night, there is no photosynthesis. Therefore, stomata are _______

• Open

• Wide open

• Closed

• Half-open

Multiple Choice

Major function of stomata in photosynthesis is _______

• Protection

• Breathing

• Exchange of gases

• food production

Experiments

To show that light is necessary for photosynthesis.

Video

https://www.youtube.com/watch?reload=9&v=_LJFUmTF5lI

Multiple Choice

The conclusion of Experiment 1 is ______

• Starch is produced in photosynthesis

• Starch is not produced in photosynthesis.

Simulated experiment

https://iwant2study.org/lookangejss/biology/ejss_model_photosynthesis/photosynthesis_Simulation.xhtml

Experiments

To show that chlorophyll is necessary for photosynthesis.

Video

https://www.youtube.com/watch?v=EIWuSapm3Ts

Multiple Choice

Conclusion of Experiment 2 is _______

• Chlorophyll is not necessary for photosynthesis.

• Starch can be produced in any part of the leaf.

• Chlorophyll is necessary for photosynthesis.

In the next class, we will learn...

• Factors affecting Photosynthesis

• Significance of Photosynthesis

Home work

• Define stomata. Describe the role of stomata in photosynthesis.

• How do you test for the role of light in photosynthesis?

• How do you test for the role of chlorophyll in photosynthesis?

Recap...

• Get ready for the quiz...

• 
  

Multiple Choice

The process, by which green plants prepare their own food is known as _______________

• Photosynthesis

• Respiration

• Symbiosis

• None of these

Fill in the Blanks

During photosynthesis, the gas released is

.

Fill in the Blanks

The presence of starch can be tested by using

.

Multiple Choice

On testing with iodine, starch turns ________ in colour.

• blue - black

• brown

Multiple Choice

The green coloured pigment in the leaves is _______

• Anthocyanine

• Chlorine

• Chlorophyll

• Xanthophyll

Multiple Choice

True or false: There are more number of stomata on the UPPER surface of the leaf than on the LOWER surface.

• True

• False

Multiple Choice

Identify the part labelled as 1.

• Epidermal cell

• Subsidiary cell

• Stomatal pore

• Guard cell

Multiple Choice

Identify the part labelled as 2.

• Epidermal cell

• Subsidiary cell

• Stomatal pore

• Guard cell

Multiple Choice

Identify the part labelled as 3.

• Epidermal cell

• Subsidiary cell

• Stomatal pore

• Guard cell

Multiple Choice

Chlorophyll helps in photosynthesis by _________

• Adding green colour

• Trapping energy from sunlight

• Exchanging gases

• Releasing oxygen

Multiple Choice

Raw materials of photosynthesis:

• Oxygen, Carbon dioxide, sugars

• Carbohydrates and Oxygen

• Oxygen, water, chlorophyll, sunlight

• Carbon dioxide, water, chlorophyll, sunlight

Multiple Choice

Products of photosynthesis:

• Oxygen, Carbon dioxide, sugars

• Carbohydrates and Oxygen

• Oxygen, water, chlorophyll, sunlight

• Carbon dioxide, water, chlorophyll, sunlight

Multiple Choice

Find the odd one out:

• Chlorophyll

• Carbon dioxide

• Water

• Sugars

• Sunlight

Multiple Choice

The whole structure consisting of the opening, guard cells and the subsidiary cells is called _____________

• Chloroplast

• Stomatal apparatus

• Lamina

• Vascular bundle

Multiple Choice

When light intensity goes up, the rate of photosynthesis goes _______.

• up

• down

• at the same rate. It does not change.

Multiple Choice

Which organisms perform Photosynthesis?

• Only Autotrophs

• Only Heterotrophs

• Autotrophs and Heterotrophs

Multiple Choice

How does carbon dioxide get into the leaves of a plant?

• It's absorbed by the roots

• It's made in a chemical reaction in the stem

• It enters through the stomata

• It goes through the flowers

Multiple Choice

How does carbon dioxide get into the leaves of a plant?

• It's absorbed by the roots

• It's made in a chemical reaction in the stem

• It enters through the stomata

• It goes through the flowers