Free Kingdom Animalia MCQs with Answers

861. Feathers of birds are water proof due to secretion of?

• A. Sudoriferous glands
• B. Endocrine glands
• C. Preen gland
• D. Thymus glands

Explanation: The correct answer is the preen gland. Birds use the preen oil secreted by the uropygial gland to waterproof their feathers. This oil helps maintain the integrity of the feathers and protects them from getting soaked, allowing birds to stay dry and maintain their ability to fly effectively. The other options, sudoriferous glands, endocrine glands, and thymus glands, do not play a role in waterproofing feathers.

862. Which of the following is sedentary in adult and active in larval stage?

• A. Sponge
• B. Leech
• C. Salamander
• D. Grasshopper

Explanation: The correct answer is Sponge. Sponges have a sedentary adult stage where they are attached to a substratum, while their larval stages (Amphiblastula and Parenchymula) are free-living and active. Leeches, salamanders, and grasshoppers are all active in both their adult and larval stages, making them incorrect choices for this question.

863. Which one is isotonic with surrounding sea water?

• A. Bony Fishes
• B. Shark
• C. Carp
• D. Paramecium

Explanation: Sharks are isotonic with sea water, meaning their body fluids have the same concentration of dissolved substances as the water. This allows them to maintain water balance easily. Bony fishes are hypotonic, needing to regulate their salt concentration. Carps are hypertonic in freshwater, while Paramecium is hypotonic due to lower solute concentration in the environment.

864. Sperms of which animal can remain viable for years within the female genital tract?

• A. Whale
• B. Bat
• C. Camel
• D. Giraffe

Explanation: In most mammals, sperm is capable of fertilizing eggs for only a few days after copulation. Female bats have the ability to store sperm for extended periods, ranging from several months to even years, making them the correct answer in this context. Whales, camels, and giraffes do not exhibit the same level of sperm viability within the female genital tract as bats do.

865. Opossum belongs to:

• A. Metatheria
• B. Eutheria
• C. Theria
• D. Prototheria

Explanation: Metatheria: Opossum belongs to the Metatheria, also known as marsupials. Marsupials are a group of mammals that give birth to relatively undeveloped young, which then complete their development in a pouch.Therefore, the correct option for opossum is 'Metatheria' as they belong to the marsupial group within the category of Theria. Eutheria, Theria, and Prototheria do not apply to opossums based on their classification characteristics.

866. Metamerism is found in:

• A. Earth worm
• B. Sponges
• C. Snakes
• D. Grass Hopper

Explanation: Metamerism is the repetition of homologous body segments. This type of development can be seen in the Annelids, which include earthworms, leeches, tubeworms, and their relatives. It is also seen in a more advanced form in the Arthropods, such as crustaceans, insects.Earthworms exhibit metamerism with distinct segments along their body, allowing for efficient movement and specialized functions in each segment. Sponges, snakes, and grasshoppers do not exhibit metamerism, making them incorrect choices for this question.

867. Nematocyst are found in:

• A. Nematodes
• B. Coelenterates
• C. Annelids
• D. Sponges

Explanation: Nematocysts are specialized structures found in coelenterates, which are multicellular aquatic animals living in colonies. These structures serve the purpose of capturing prey and defense. The other options, nematodes, annelids, and sponges, do not possess nematocysts and have different mechanisms for feeding and defense.

868. Which of the following is not present in fish?

• A. middle ear
• B. internal ear
• C. gills
• D. fins

Explanation: Middle ear: Fish do not possess a middle ear like mammals. Instead, they have a unique structure called the swim bladder, which is used for buoyancy control and sound detection. The swim bladder is not directly involved in hearing like the middle ear in mammals.In summary, while fish possess internal ears, gills, and fins, they do not have a middle ear as found in mammals.

869. Which of the following has four-chambered hearts?

• A. Lizard
• B. Turtle
• C. Crocodile
• D. Frog

Explanation: Crocodiles are one of the few reptiles that have a four-chambered heart, similar to that of birds and mammals. Their heart has two atria and two ventricles, which are completely separated by a muscular wall known as the septum.

870. Which one of the following animals has no alimentary canal?

• A. Ascaris
• B. Pinworm
• C. Planaria
• D. Tapeworm

Explanation: Tapeworms are parasitic flatworms, they do not possess an alimentary canal.