Q – What are trees, and how do they differ from other plants?
ANS – Trees are tall, big, and perennial plants that live for many years. They have a hard and strong stem or trunk, branches at some height above the ground, and bear flowers and fruit for many years.
Q – How do the roots of carrot and radish differ from the roots of other plants?
ANS – The roots of carrot and radish are taproots that not only absorb and transport water and nutrients but also store food, while the roots of other plants may be fibrous and mainly serve to absorb and transport water and nutrients.
Q – What are herbs, and how do they differ from trees and shrubs?
ANS – Herbs are plants that grow up to 1 to 1.5 meters tall, and their stems are green and flexible compared to those of trees and shrubs. They may live for a few months or up to two years. Herbs are different from trees and shrubs in their size, stem flexibility, and lifespan.
Q – What are the characteristics of a shrub’s stem, and can you provide examples of shrubs?
ANS – A shrub’s stem is thick and hard, and it gives out branches very close to the ground. Examples of shrubs include oleander, hibiscus, lantana, koranti, and rose.
Q – How do herbs differ from other types of plants in terms of height and lifespan?
ANS – Herbs are shorter in height than trees and shrubs, growing up to 1 to 1.5 meters tall. They also have a shorter lifespan, living for a few months or up to two years.
Q – What are aerial roots?
ANS – Aerial roots are roots that grow from the stem or branches of a plant into the air. These roots help the plant to climb or attach itself to a vertical support.
Q – What is the difference between annuals, biennials, and perennials?
ANS – Annuals complete their lifecycle in one year, from seed to maturity and then death. Biennials take two years to complete their lifecycle, growing vegetatively in the first year and flowering and setting seed in the second year. Perennials live for many years, producing flowers and fruits repeatedly throughout their lifespan.
Q – What is the lifecycle of annual plants like?
ANS – The lifecycle of annual plants starts from a seed, which germinates and grows into a vegetative plant. The plant produces flowers and sets seeds in one growing season, after which it dies.
Q – How is the body structure of animals diverse?
ANS – Different animals have developed different shapes to survive in the environment. There is a great variety in the body structure of animals too. Animals have body parts like a head, a neck, a torso, a tail, and limbs for movement. They have various organ systems which carry on various functions inside their body.
Q – How are animals classified based on the mode of reproduction?
ANS – According to the mode of reproduction, animals are classified into two types, namely, oviparous animals which lay eggs and viviparous animals which give birth to their young ones.
Q – What is the difference between oviparous and viviparous animals?
ANS – Oviparous animals lay eggs and their young ones hatch from the eggs outside the mother’s body. Viviparous animals give birth to their young ones after the development of the embryo inside the mother’s body.
Q – What are amphibious animals? Give an example.
ANS – Amphibious animals are those that can live both on land and in water. Frogs, toads, and salamanders are examples of amphibious animals.
Q – What is meant by the aerial mode of life in animals? Give some examples.
ANS – The aerial mode of life in animals means the ability to fly in the air. Kites, eagles, crows, butterflies, and honeybees are some examples of animals with an aerial mode of life.
