Test: Adaptations in Plants- 2 - Class 4 MCQ

Floating plants like duckweed and water hyacinth stay on the surface of water because they are spongy and light. This means they are full of air and very light, like a sponge. This helps them float easily on the water.

Aquatic habitats are areas in the water like oceans, seas, lakes, ponds, rivers, and streams. Terrestrial habitats are places on land like forests and gardens.

• Explanation: Water lily is not an example of a floating plant. Water lilies are fixed plants with roots fixed to the bottom of the water body such as a pond. They have broad leaves that float on water, and they have waxy coatings that help keep the leaves dry and prevent rotting. So, the statement is False.
• Interesting Fact: Water lilies are known for their beautiful flowers that bloom on the surface of the water!

• Plants that grow on land are called terrestrial plants.
• These plants are adapted to living on the ground, unlike water plants that grow in water.
• Terrestrial plants have roots that help them absorb water and nutrients from the soil to grow big and strong.
• So, the correct answer is terrestrial plants, which means plants that grow on land.

• Plants that grow in the plains have leaves that help water to evaporate and keep the tree cool when the climate gets hot.
• Explanation: This statement is True. Plants in the plains have flat leaves that help water to evaporate and keep the tree cool when it's hot. Flat leaves also help to trap a lot of sunlight, which the plant needs for photosynthesis, a process that helps plants make their food.

Some trees shed all their leaves during autumn to survive harsh weather. This helps them conserve energy and protect themselves from the cold. By dropping their leaves, the trees can focus on staying strong until spring comes again.

• The tree is evergreen, often reaching 15–18 metres (50–60 feet) in height and attaining great age. 

Trees in coastal areas have a strong stem so that they can withstand strong winds that blow near the sea. This helps the trees stay upright and not get blown down easily. It's like how you hold onto something sturdy when it's windy so you don't get blown away.