Autotrophic Nutrition

Q.

Some plants have deep red, violet or brown color leaves. Can they perform photosynthesis?

Q.

How would you test the presence of starch in leaves

Q. Which of the following gas is released during the process of photosynthesis?

1. Hydrogen
2. Nitrogen
3. Oxygen
4. Carbon dioxide

Q.

6Co₂+ 6H₂O sunlight/chlorophyll C₆ H₁₂ O6 + 6O₂

Please explain this equation?

Q.

Organisms that make their own food are called ___ .

1. Heterotrophs

2. Parasites

3. Saprophytes

4. Autotrophs

Q.

The levels of oxygen and carbon dioxide are maintained constant in the atmosphere by

1. Respiration by Animals and Plants

2. Processes of Respiration and Evaporation

3. Photosynthesis by Plants and Animals

4. Processes of Respiration and Photosynthesis

Q. Assertion [A]: Photosynthesis takes place in plants with green leaves.

Reason [R]: Green leaves contain chlorophyll.

1. A is true and R is false.
2. A is false and R is true.
3. Both A and R are true and R is the correct explanation for A.
4. Both A and R are true but R is not the correct explanation for A.

Q.

The oxygen in photosynthesis is released from:

1. Water

2. Chlorophyll

3. Carbon dioxide

4. All of these

Q.

How is hydrogen used in photosynthesis?

Q.

A farmer grows tomatoes in a greenhouse. He keeps bright lights on in the greenhouse at night. What will be the effect on the growth of tomatoes?

Q.

What are the Minor Plant Nutrients?

Q.

What would happen if the leaves of a money plant is coated with oil?

Q.

During starch test, why is leaf boiled in alcohol for a short time

Q. Which of the following processes will not happen if leaves are coated with oil?

1. Photosynthesis
2. Transpiration
3. Exchange of gases
4. Absoprtion of water

Q. Chlorophyll from leaves can be removed by boiling it in alcohol.

1. False
2. True

Q. Which among the following plants do not contain chlorophyll?

1. Utricularia
2. Cuscuta
3. Drosera
4. China rose

Q.

Carbon dioxide is released as a by-product during photosynthesis.

1. True
2. False

Q.

How does photosynthesis and respiration help in maintaining the O₂ and CO₂ cycle?

Q. Living organisms obtain energy from .

1. food
2. water
3. air

Q. Question 9
Potato and ginger are both underground parts that store food. Where is the food prepared in these plants?

Q.

Give an equation for the process of photosynthesis in plants.

Q.

Distinguish between a parasite and a saprotroph. [3 MARKS]

Q.

Why plants can't absorb the nitrogen from the air ?

Q.

Define autotrophs.

Q.

Complete the following equation.

1. 
   A) Oxygen; B) Sunlight;
   C) Carbon dioxide
2. 
   A) Carbon dioxide; B) Chlorophyll;
   C) Carbon dioxide
3. 
   A) Sunlight; B) Chlorophyll;
   C) Chlorophyll
4. 
   A) Carbon dioxide; B) Sunlight;
   C) Oxygen

Q.

The mode of nutrition in which organisms make their own food from simple substances is called ____ nutrition.

1. Heterotrophic

2. Autotrophic

3. Nutritrophic

4. Holozoic

Q.

The energy change in photosynthesis is the-

1. Light energy to electrical energy

2. Light energy to molecular energy

3. Light energy to chemical energy

4. Light energy to activation energy

Q.

Which of the following can convert atmospheric nitrogen into nitrates?

1. Azotobacter

2. Lichen

3. Nitrobacter

4. Monotropa

Q.

Why do plants need nitrogen?

Q. The transpiration process takes place mostly in the ___ of the plant.

1. stems
2. roots
3. leaves
4. flowers