MCQ on Class 4 Science Plant Adaptations

Last updated on December 9th, 2023 at 10:02 pm

Class 4 Science – Plant Adaptations

 

Class 4 Science – Plant Adaptations covers the various adaptations of plants in different environments such as deserts, mountains, rain-forests, and aquatic habitats. Students will learn about how plants have evolved to survive and thrive in these diverse environments.

 

What is a habitat?

1. a) The natural home of a living organism
2. b) A place where animals go to hibernate
3. c) A type of plant species

Answer: a) The natural home of a living organism

 

What are the factors that make up a habitat?

1. a) Only biotic factors
2. b) Only abiotic factors
3. c) Both biotic and abiotic factors

Answer: c) Both biotic and abiotic factors

 

Which of the following adaptations allow a cactus to survive in a desert?

1. a) Large leaves to absorb more sunlight
2. b) Thick waxy coating to prevent water loss
3. c) Ability to hibernate during the day

Answer: b) Thick waxy coating to prevent water loss

 

Which of the following plants is most likely to survive in a pond environment?

1. a) Cactus plant
2. b) Lotus plant
3. c) Pine tree

Answer: b) Lotus plant

 

What are terrestrial plants?

1. a) Plants that grow on land
2. b) Plants that grow in water
3. c) Plants that grow in marshy regions

Answer: a) Plants that grow on land

 

What factors do plants adapt to in their habitat?

1. a) Only the type of soil
2. b) Only the amount of rainfall
3. c) Weather, amount of rainfall, type of soil, and other such factors

Answer: c) Weather, amount of rainfall, type of soil, and other such factors

 

What is the adaptation seen in plants that grow in flat planes?

1. a) More branches and less space to spread out
2. b) Less branches and more space to spread out
3. c) No branches and very small leaves

Answer: b) Less branches and more space to spread out

 

What type of leaves do plants in flat planes have?

1. a) Round leaves
2. b) Thin and long leaves
3. c) Flat leaves to trap sunlight

Answer: c) Flat leaves to trap sunlight

 

Which of the following plants is an example of a terrestrial plant that grows in flat planes?

1. a) Seaweed
2. b) Cherry
3. c) Water lily

Answer: b) Cherry

 

What are deciduous trees?

1. a) Trees that never lose their leaves
2. b) Trees that shed their leaves once in a year
3. c) Trees that only grow in deserts

Answer: b) Trees that shed their leaves once in a year

 

What are evergreen trees?

1. a) Trees that lose all their leaves once in a year
2. b) Trees that never lose their leaves
3. c) Trees that only grow in rainforests

Answer: b) Trees that never lose their leaves

 

What is the adaptation seen in plants that grow in deserts?

1. a) Large leaves to absorb more sunlight
2. b) Ability to hold a lot of water in their roots
3. c) Ability to survive with less water and adapt to hot and dry conditions

Answer: c) Ability to survive with less water and adapt to hot and dry conditions

 

What is the soil like in deserts?

1. a) Rich in nutrients
2. b) Sandy and cannot hold much water
3. c) Clayey and holds a lot of water

Answer: b) Sandy and cannot hold much water

 

Which of the following plants is an example of a desert plant?

1. a) Pine tree
2. b) Cactus
3. c) Maple tree

Answer: b) Cactus

 

Why do cacti plants have reduced leaves?

1. a) To maximize photosynthesis
2. b) To minimize transpiration and protect from herbivorous animals
3. c) To absorb more water

Answer: b) To minimize transpiration and protect from herbivorous animals

 

What is the function of waxy hair and spiny outer surfaces in cacti plants?

1. a) To attract pollinators
2. b) To reduce water loss through transpiration
3. c) To absorb more sunlight

Answer: b) To reduce water loss through transpiration

 

What is the function of spongy stems in cacti plants?

1. a) To store water
2. b) To absorb sunlight
3. c) To reduce water loss

Answer: a) To store water

 

What is the color of cacti stems and why?

1. a) Red, to attract pollinators
2. b) Green, due to the presence of chlorophyll and for photosynthesis
3. c) Brown, for protection from herbivorous animals

Answer: b) Green, due to the presence of chlorophyll and for photosynthesis

 

What are the adaptations in cacti plants?

1. Long and thick roots that grow deep into the ground
2. Broad leaves to absorb sunlight
3. Many stomata on their leaves
4. Narrow spines for reduced transpiration and protection

Answer: d. Narrow spines for reduced transpiration and protection

 

What are xerophytes?

1. Plants that grow in the mountains
2. Plants that store water and can live for a long period of time without rain
3. Plants that grow in marshy regions
4. Plants that have broad leaves to absorb water

Answer: b. Plants that store water and can live for a long period of time without rain

 

What are conifers?

1. Trees that bear flowers
2. Trees that do not bear flowers
3. Trees that have broad leaves
4. Trees that have seeds in their flowers

Answer: b. Trees that do not bear flowers and have seeds in their cones.

 

What are the adaptations of plants in the rainforest?

1. They have narrow leaves to prevent water from staying on them.
2. They have small leaves to avoid the harsh sunlight.
3. They have broad and abundant leaves to capture sunlight for photosynthesis.
4. They have no leaves to reduce water loss.

Answer: C

 

Why do evergreen trees not shed all their leaves at once?

1. They have plenty of sunlight and water throughout the year.
2. They do not need to conserve water.
3. They do not have enough energy to grow new leaves.
4. They are afraid of losing their leaves.

Answer: A

 

What is the purpose of the drip-tip leaves in evergreen trees?

1. To prevent the leaves from rotting.
2. To attract pollinators.
3. To protect the leaves from herbivores.
4. To store water.

Answer: A

 

What is the reason for the tallness of plants in the rainforest?

1. To protect themselves from herbivores.
2. To capture maximum sunlight available.
3. To conserve water.
4. To avoid the harsh sunlight.

Answer: B

 

What are breathing roots?

1. a) Roots that grow deep into the soil
2. b) Roots that grow above the soil
3. c) Roots that absorb maximum sunlight
4. d) Roots that help in photosynthesis

    Answer: b) Roots that grow above the soil

 

Which type of trees grow in marshy regions?

1. a) Coniferous trees
2. b) Deciduous trees
3. c) Mangroves
4. d) Coconut trees

    Answer: c) Mangroves

 

What are the adaptations of plants that grow in coastal regions?

1. a) Strong and flexible stem
2. b) Deep roots
3. c) Shiny leaves to reflect sunlight
4. d) All of the above

    Answer: d) All of the above

 

What is the method of seed dispersal in coconut trees?

1. a) Wind
2. b) Animals
3. c) Water
4. d) Self-dispersal

    Answer: c) Water

 

What are the adaptations of floating plants?

1. a) Their roots are fixed in the mud
2. b) They have broad and flat leaves
3. c) Their bodies are filled with water
4. d) Their leaves are waxy and repel water

    Answer: d) Their leaves are waxy and repel water

 

What is the adaptation of fixed plants?

1. a) Their roots are loosely hanging
2. b) Their leaves are narrow and pointed
3. c) Their stems are thick and rigid
4. d) Their stomata are present on the upper surface of leaves

    Answer: d) Their stomata are present on the upper surface of leaves

 

Why do the stems of fixed plants need to be flexible?

1. a) To bend with the flow of water
2. b) To grow taller
3. c) To store water
4. d) To avoid predators

    Answer: a) To bend with the flow of water

 

Which of the following is a floating plant?

1. a) Water lily
2. b) Lotus
3. c) Duckweed
4. d) Rhizophora

    Answer: c) Duckweed

 

What is the purpose of the waxy coating on the leaves of fixed plants?

1. a) To attract pollinators
2. b) To prevent them from getting affected by strong winds
3. c) To prevent them from rotting
4. d) To repel insects

    Answer: c) To prevent them from rotting

 

What is the main adaptation in the leaves of submerged plants?

1. a) They have stomata on the upper surface
2. b) They have small holes in the stems for breathing
3. c) They have a waxy coating to prevent waterlogging
4. d) They have broad and flat leaves

Answer: b) They have small holes in the stems for breathing

 

What is the source of carbon dioxide for the submerged plants?

1. a) Soil
2. b) Sunlight
3. c) Air
4. d) Aquatic animals

Answer: d) Aquatic animals

 

How are the roots of submerged plants fixed?

1. a) They float on the surface of the water
2. b) They are loosely hanging
3. c) They are fixed in the soil underwater
4. d) They are fixed in the mud at the bottom of the water bed

Answer: c) They are fixed in the soil underwater