Nutrition in Plants Quiz

Why do organisms take food?

• To look colorful

• To get energy for growth and maintenance of their body

• To attract other organisms

• To grow taller

Answer explanation

Organisms take food to get energy for growth and maintenance of their body.

Distinguish between a parasite and a saprotroph.

• A parasite is green, while a saprotroph is not

• A parasite is a plant, while a saprotroph is an animal

• A parasite feeds on dead matter, while a saprotroph feeds on living organisms

• A parasite feeds on living organisms, while a saprotroph feeds on dead matter

How would you test the presence of starch in leaves?

• Perform a salt test

• Perform a flame test

• Perform an iodine test

• Perform a pH test

Answer explanation

Performing an iodine test is the correct method to test the presence of starch in leaves as iodine reacts with starch to produce a blue-black color.

Give a brief description of the process of synthesis of food in green plants.

• Photosynthesis is the process of converting carbohydrates into proteins

• Photosynthesis is the process of converting carbon dioxide and water into carbohydrates using sunlight

• Photosynthesis is the process of converting water into oxygen

• Photosynthesis is the process of converting light into heat

Answer explanation

Photosynthesis is the process of converting carbon dioxide and water into carbohydrates using sunlight

Show with the help of a sketch that plants are the ultimate source of food.

• Plants -> Animals -> Humans

• Sketch not required

• Plants -> Soil -> Humans

• Plants -> Sun -> Humans

Answer explanation

Plants are the ultimate source of food as they are consumed by animals, which are then consumed by humans, forming the food chain: Plants -> Animals -> Humans.

Fill in the blanks: Green plants are called _________________ since they synthesise their own food.

• Heterotrophs

• Saprotrophs

• Autotrophs

• Parasites

Answer explanation

Green plants are called Autotrophs since they synthesise their own food, distinguishing them from Heterotrophs, Saprotrophs, and Parasites.

Cuscuta is an example of:

• Autotroph

• Host

• Parasite

• Saprotroph

Answer explanation

Cuscuta is an example of a parasite because it relies on other plants for nutrients and lacks chlorophyll to produce its own food.

Which part of the plant takes in carbon dioxide from the air for photosynthesis?

• Petals

• Leaf veins

• Stomata

• Root hair

Answer explanation

Stomata are tiny openings on the surface of leaves that take in carbon dioxide from the air for photosynthesis, making it the correct choice.

Plants take carbon dioxide from the atmosphere mainly through their:

• Stem

• Flowers

• Leaves

• Roots

Answer explanation

Plants take carbon dioxide from the atmosphere mainly through their leaves.

Why do farmers grow many fruits and vegetable crops inside large green houses? What are the advantages to the farmers?

• To protect the crops from sunlight

• To protect the crops from water

• To regulate the amount of light, water, and carbon dioxide for optimal growth

• To prevent the crops from growing

Answer explanation

To regulate the amount of light, water, and carbon dioxide for optimal growth