G-8..PLANT NUTRITION..2021

G-8..PLANT NUTRITION..2021

Multiple Choice

Which product of photosynthesis is diffused out of stomata?

• glucose

• oxygen

• carbon dioxide

• water

Fill in the Blank

What provides a plant with energy for photosynthesis?

Fill in the Blank

Where does photosynthesis take place?

Multiple Choice

In which form glucose is transported to other parts of the plant?

• Starch

• Carbohydrates

• Sucrose

• Cellulose

Fill in the Blank

Glucose is stored in the plant cells in the form of __________________.

Fill in the Blank

Which form of starch is used by the plant for respiration?

Multiple Select

Why is the leaf first boiled in water?

• To break down the cuticle.

• To cook the leaf.

• To kill the leaf.

Multiple Choice

Why is the leaf then boiled in alcohol?

• To remove starch.

• To remove cell sap.

• To remove chlorophyll.

Fill in the Blank

What colour change can be observed if starch is present?

Multiple Choice

What is the need for de-starching the plant before the experiment?

• To remove the starch.

• To make the leafs soft

• To remove the chlorophyll.

Fill in the Blank

What gas would you expect a leaf to take in darkness?

Multiple Choice

Why some of the leaves were covered with strips in the experiment?

• To protect chlorophyll

• To block sunlight

• To expose it to sunlight

Multiple Choice

Why potassium hydroxide is used in the experiment?

• To provide CO2

• To absorb CO2

• To increase the level of CO2

Fill in the Blank

Which gas will be accumulated in the test tube during the experiment?

Multiple Choice

Which one of the following is not a limiting factor for photosynthesis?

• Temperature

• Water

• Carbon dioxide

• Light

Multiple Choice

Excess temperature decreases the rate of photosynthesis:

• enzymes get more energy

• enzymes become slower

• enzymes gets denatured

Fill in the Blank

Which gas can be controlled in a greenhouse to increase the rate of photosynthesis?

Multiple Choice

Which adaptation of the leaf increases the surface area?

• thin

• wide & flat

• stomata

• veins

Multiple Select

Identify the functions of the veins in a leaf.

• gases exchange

• surface area

• carry sugars

• carry water

Fill in the Blank

Name the layer with most of the chlorophyll.

Multiple Choice

What is the function of the spongy mesophyll layer?

• photosynthesis

• gaseous exchange

• carry water

Fill in the Blank

Water & minerals are transported by ___________________ .

Multiple Choice

Which mineral present in chlorophyll?

• Nitrogen

• Magnesium

• Phosphorous

Fill in the Blank

_________________________ is necesarry for making cell proteins in plants

Multiple Select

Phosphates are important for the plants to :

• Make chlorophyll

• Seed development

• Root growth

• greener leaves

Multiple Choice

Identify the leaf with chlorosis from the following.