Last updated on December 9th, 2023 at 09:59 pm
Class 4 Science – How do Plants make food
What is the main function of leaves in plants?
- a) To produce oxygen
- b) To provide support
- c) To make food for the plant
- d) To attract pollinators
Answer: c) To make food for the plant
Which pigment is responsible for the green color of leaves?
- a) Carotene
- b) Xanthophyll
- c) Chlorophyll
- d) Anthocyanin
Answer: c) Chlorophyll
What is the process by which leaves prepare food in plants?
- a) Respiration
- b) Transpiration
- c) Photosynthesis
- d) Absorption
Answer: c) Photosynthesis
What are plants called as they are able to make their food?
- a) Consumers
- b) Producers
- c) Decomposers
- d) Predators
Answer: b) Producers
Which of the following is required for photosynthesis to occur?
- a) Water
- b) Oxygen
- c) Nitrogen
- d) Hydrogen
Answer: a) Water
What is the main function of roots in plants?
- a) To produce food
- b) To provide support
- c) To absorb water and minerals from the soil
- d) To attract pollinators
Answer: c) To absorb water and minerals from the soil
What is the structure that attaches the leaf to the stem called?
- a) Lamina
- b) Apex
- c) Midrib
- d) Petiole
Answer: d) Petiole
What is the main function of veins in leaves?
- a) To provide support
- b) To transport water and minerals
- c) To produce food
- d) To attract pollinators
Answer: b) To transport water and minerals
Which part of the leaf is responsible for carrying water and minerals from the stem to the leaf?
- a) Midrib
- b) Lamina
- c) Apex
- d) Petiole
Answer: a) Midrib
What is the main function of the leaf blade or lamina?
- a) To absorb water and minerals
- b) To provide support
- c) To make food for the plant
- d) To attract pollinators
Answer: c) To make food for the plant
What is the arrangement of veins in a leaf called?
- a) Network
- b) Venation
- c) Reticulation
- d) Parallelism
Answer: b) Venation
What are the two types of venation?
- a) Circular and spiral venation
- b) Radial and diagonal venation
- c) Reticulate and parallel venation
- d) Divergent and convergent venation
Answer: c) Reticulate and parallel venation
In which type of venation are the veins arranged in the form of a network?
- a) Parallel venation
- b) Circular venation
- c) Spiral venation
- d) Reticulate venation
Answer: d) Reticulate venation
Which type of venation is found in plants with a fibrous root system?
- a) Reticulate venation
- b) Spiral venation
- c) Circular venation
- d) Parallel venation
Answer: d) Parallel venation
Which part of the leaf determines the type of venation in a plant?
- a) Lamina
- b) Midrib
- c) Petiole
- d) Apex
Answer: b) Midrib
What are the tiny pores present in the leaves called?
- a) Stomata
- b) Veins
- c) Midribs
- d) Lamina
Answer: a) Stomata
Where are stomata generally present on a leaf?
- a) Upper surface
- b) Both upper and lower surface
- c) Lower surface
- d) None of the above
Answer: c) Lower surface
What is the process by which plants give out excess water in the form of water vapour through stomata?
- a) Transpiration
- b) Photosynthesis
- c) Respiration
- d) Absorption
Answer: a) Transpiration
What is the green pigment present in the leaves that traps sunlight?
- a) Chloroplast
- b) Chlorophyll
- c) Mitochondria
- d) Ribosome
Answer: b) Chlorophyll
What is the arrangement of leaves on the stem of a plant called?
- a) Photosynthesis
- b) Transpiration
- c) Phyllotaxy
- d) Respiration
Answer: c) Phyllotaxy
What is the phyllotaxy arrangement of leaves in plants like Hibiscus and Sunflower?
- Opposite phyllotaxy
- Alternate or spiral phyllotaxy
- Whorl phyllotaxy
Answer: b. Alternate or spiral phyllotaxy
What is the phyllotaxy arrangement of leaves in plants like Guava and Neem?
- Opposite phyllotaxy
- Alternate or spiral phyllotaxy
- Whorl phyllotaxy
Answer: a. Opposite phyllotaxy
What is the phyllotaxy arrangement of leaves in plants like Oleander and Pomegranate?
- Opposite phyllotaxy
- Alternate or spiral phyllotaxy
- Whorl phyllotaxy
Answer: c. Whorl phyllotaxy
What is the process by which plants prepare their food?
- Respiration
- Transpiration
- Photosynthesis
Answer: c. Photosynthesis
What is the sugar called that is prepared during photosynthesis in plants?
- Fructose
- Glucose
- Sucrose
Answer: b. Glucose
What is given out during the process of photosynthesis in plants?
- Carbon dioxide
- Water
- Oxygen
Answer: c. Oxygen
What is the primary form of sugar produced during photosynthesis?
- a) Fructose
- b) Sucrose
- c) Glucose
- d) Maltose
Answer: c) Glucose
Where is the extra food prepared during photosynthesis stored in a plant?
- a) Only in the leaves
- b) Only in the roots
- c) In different parts of the plant
- d) In the stem and flowers only
Answer: c) In different parts of the plant
Which of the following parts of a plant can be eaten and is a good source of nutrients?
- a) Roots
- b) Leaves
- c) Flowers
- d) All of the above
Answer: d) All of the above
What is the primary purpose of seeds in a plant?
- a) To store nutrients
- b) To produce flowers
- c) To carry out photosynthesis
- d) To grow into a new plant
Answer: d) To grow into a new plant
Which plant has spines instead of leaves to adapt to the hot environment?
- a) Venus flytrap
- b) Croton
- c) Cactus
- d) Picture plant
Answer: c) Cactus
What is the unique feature of the leaves of the Croton plant?
- a) They have spines
- b) They are red or yellow
- c) They are shaped like pictures
- d) They trap insects
Answer: b) They are red or yellow
How does the Picture Plant catch insects?
- a) By trapping them in small halves with stiff hairs on the edges
- b) By secreting digestive juices to digest the insect
- c) By having brightly coloured leaves
- d) By using downward pointing hairs to prevent the insect from escaping
Answer: d) By using downward pointing hairs to prevent the insect from escaping
What is the unique feature of the Venus flytrap?
- a) It has spines instead of leaves
- b) Its leaves are shaped like pictures
- c) Its leaves snap shut quickly to trap insects
- d) It has red or yellow leaves
Answer: c) Its leaves snap shut quickly to trap insects
What are plants called that do not make their own food and depend on a host for nutrition?
- a) Insectivorous plants
- b) Parasitic plants
- c) Cacti plants
- d) Croton plants
Answer: b) Parasitic plants
Which of the following is a total parasite?
- a) Mistletoe
- b) Cuscuta
- c) Santalum
- d) Venus flytrap
Answer: b) Cuscuta
What are the special roots developed by cuscuta to absorb food and water from the host plant called?
- a) Haustoria
- b) Spines
- c) Rhizomes
- d) Tubers
Answer: a) Haustoria
Which of the following plants is a partial parasite?
- a) Cuscuta
- b) Striga
- c) Mistletoe
- d) Sundew plant
Answer: c) Mistletoe
