Olympiad Test: Animals - 1 - Class 5 MCQ

Correct answer is option A.

Habitat refers to:

A: An animal’s immediate natural surroundings which contains an arrangement of food, water, shelter or cover, and space that meets the animal’s needs

This definition contains several important components:
- Immediate natural surroundings: A habitat is the specific area where an animal can be found, including the physical characteristics of the environment such as temperature, humidity, and vegetation.
- Arrangement of food, water, shelter, or cover: A habitat provides the necessary resources for an animal to survive. This includes sources of food and water, as well as shelter or cover from predators and adverse weather conditions.
- Space that meets the animal's needs: A habitat must provide enough space for an animal to carry out its daily activities, including finding food, mating, and raising its young.
- Meeting the animal's needs: A suitable habitat is one that meets all of the requirements for an animal to survive and reproduce, ensuring the continuation of its species.

In conclusion, a habitat is an animal's immediate natural surroundings that provide the necessary resources and conditions for it to thrive. These resources include food, water, shelter, and space, all of which must be adequate to meet the needs of the animal.

Correct answer is option C) An interactive system of living organisms and non-living parts of the environment where these interactions take place.

Explanation:

An ecosystem is a complex network of interactions between living organisms (plants, animals, and microorganisms) and non-living components (air, water, and soil) in a specific area. These interactions create a stable and balanced environment where the organisms can thrive and maintain the overall health of the ecosystem.

Correct answer is option D) Invertebrates

Percentage of Animal Categories in the Animal World:

The correct answer is Invertebrates.

• Mammals: A small percentage of the animal world.
• Vertebrates: About 3-5% of the animal world, including mammals, birds, reptiles, amphibians, and fish.
• Soft-bodied animals: A subset of invertebrates, including animals like worms and mollusks.
• Invertebrates: Make up approximately 90% of the animal world, consisting of animals without a backbone or spinal column, such as insects, arachnids, crustaceans, and many more.

Correct answer is option D) Fish

Longest Living Group of Animals on Earth

- Fish
- Fish have been on Earth for more than 500 million years.
- They evolved from ancient marine organisms during the Cambrian period.
- Fish represent a diverse group of animals, including jawless, cartilaginous, and bony fish.
- Other Groups
- Birds: Evolved from reptiles, specifically theropod dinosaurs, around 150 million years ago.
- Mammals: Evolved from synapsid reptiles around 200 million years ago.
- Whales: Evolved from land-dwelling mammals around 50 million years ago.

A grasshopper can camouflage itself in the grass to protect itself from the predator.

Adaptations for Aquatic Movement:

• Streamlined body (A): A streamlined body helps reduce drag in water, allowing aquatic animals to move more efficiently.


• Webbed feet (C): Webbed feet provide additional surface area for propulsion and steering in water, making it easier for aquatic animals to move.


• Gills (D): Gills are organs that allow aquatic animals to extract oxygen from water, enabling them to breathe underwater and support their movement.


• Fins (E): Fins help aquatic animals stabilize and steer in water, contributing to their ease of movement.

Who am I?

I am a water-dwelling creature known for my unique characteristics. Let's explore the options and determine who I am.

A: Emu
- Emus are large, flightless birds found in Australia.
- They are not known for swimming or living in swamps, so they are not the correct answer.
B: Water Holding Frog
- Water Holding Frogs, also known as water-holding frogs or desert frogs, are found in arid regions of Australia.
- They have the ability to store water in their bodies during dry periods, but they do not specifically swim in swamps or croak in creeks.
C: Green and Golden Bell Frog
- The Green and Golden Bell Frog, also known as Litoria aurea, is a species of frog native to eastern Australia.
- They are known for their ability to swim in swamps and dams.
- They have distinct bloat cheeks, which they use to make loud croaking sounds in creeks.
D: Penguins
- Penguins are flightless birds that inhabit the Southern Hemisphere, particularly in Antarctica.
- While they are excellent swimmers, they do not live in swamps or croak in creeks.
Conclusion:
Based on the given options, the correct answer is C: Green and Golden Bell Frog. They are known for swimming in swamps, bloat their cheeks, dive in dams, and croak in creeks.

A parrot can fly while a penguin can't so the correct answer is Parrot, Penguin.

Camouflage is an animal's ability to blend in with its surroundings so it is not seen by other living things.

A) Perspiration (sweating) is the loss of water and salts through the surface of the skin. This water evaporates. Urine is mostly water and is also composed of salts and is excreted by the animal into the environment. While breathing, minute molecules of water or water vapour are given out into the environment along with carbon dioxide.
B) While drinking water, the animal consumes it from the environment.
C) Perspiration and urination release water into the environment.
D) Breathing releases water in form of water vapour into the environment.
So, the correct answer is '(i), (iii) and (iv)'.