Test: Characteristics of Living Beings - Class 6 MCQ

Presence of features which enable plants and animals to live in a habitat is called adaptation.

Aquatic animals use gills for respiration.

Bending of stem towards sunlight is called phototropism.

Decay is one of the features which is not a property of living beings. It can take place only after the death of a person where metabolism, reproduction and growth are characteristic of living beings.

• Fins: Fins are the thin, membranous, winglike or paddlelike organs that are attached to a fish's body. They help in steering, balancing, and stabilizing the fish as it moves through the water.


• Tails: The tail of a fish, also known as the caudal fin, is the main propulsive organ. It moves from side to side to generate forward motion, allowing the fish to swim efficiently.


• Combination: By using their fins and tails in coordination, fishes are able to navigate through the water with precision and speed. The fins provide control and maneuverability, while the tail generates propulsion, enabling fishes to swim in various directions and speeds.


• Adaptations: The shape, size, and placement of fins and tails vary among different species of fish, reflecting their unique adaptations to their environments. Some fishes have elongated fins for precise movements, while others have powerful tails for swift swimming.


• Overall: The combination of fins and tails allows fishes to move gracefully and effectively in their aquatic habitats, showcasing the remarkable evolutionary adaptations that enable them to thrive in diverse ecosystems.

• Hydrilla: Hydrilla is a submerged aquatic plant that grows completely underwater. It is a highly invasive species that can form dense mats in bodies of water, impacting native plant and animal species.


• Water hyacinth, water lily, and lotus are all aquatic plants, but they typically grow partially or completely above the water's surface.

• Yaks have hair on their bodies: Yaks are covered in a thick layer of long, shaggy hair that helps to keep them warm in their cold mountainous habitats.


• Insulation: The hair of yaks provides insulation by trapping air close to their bodies, which helps regulate their body temperature in harsh environments.


• Protection: The hair of yaks also protects them from the elements such as snow, wind, and rain, allowing them to survive in extreme conditions.


• Adaptation: Yaks have evolved to have this hair covering as a natural adaptation to their high-altitude environments, making them well-suited to their habitats.

• A: log piece - Logs are cut pieces of wood that have been separated from the tree. They are no longer living and do not have the ability to grow or reproduce. Therefore, log piece is the non-living thing among the options given.


• B: tree - Trees are living organisms that grow, reproduce, and require sunlight, water, and nutrients to survive.


• C: grasshopper - Grasshoppers are living creatures that belong to the animal kingdom and have the ability to move, eat, and reproduce.


• D: dog - Dogs are living animals that breathe, eat, move, and reproduce. They are part of the animal kingdom and are considered living organisms.

• Mimosa plant: The leaves of the Mimosa plant fold up when they are touched. This is a defense mechanism to protect the plant from potential harm.


• Mango plant: The leaves of the Mango plant do not fold up when touched. They remain in their position.


• Money plant: The leaves of the Money plant also do not fold up when touched. They stay as they are.


• Mustard plant: The leaves of the Mustard plant do not fold up when touched. They do not exhibit this behavior.