Free Biodiversity and Variety of Life MCQs with Answers

• A. Middle ear
• B. Internal ear
• C. Gills
• D. Fins

Explanation: Option A: Middle ear and external ear are not found in fishes. All tetrapods i.e.

• A. pigeon
• B. frog
• C. monkey
• D. rabbit

Explanation: Occipital condyle is a rounded knob-like structure that is present at the base of the skull which articulates with the first vertebra.

• A. Typhlosole
• B. Intestinal caeca
• C. Esophagus
• D. Pharyngos mass

Explanation: The pharynx of an earthworm, particularly the pharyngeal mass, is where various digestive enzymes are secreted.

• A. Papillae
• B. Setae
• C. Pseudopodia
• D. Cuticle

Explanation: Organs of locomotion in earth worms are setae. Setae are present on parapodia on the body wall or embedded in sacs.

• A. Leopardfish
• B. Fish
• C. Crocodile
• D. None of above

Explanation: Fishes have two chambered heart which include an auricle and an ventricle.

• A. Uromastyx
• B. Salamander
• C. Seahorse
• D. Kangaroo

Explanation: Homoeothermic animals are those animals which can maintain their body temperature irrespective of external temperature variation, i.e.

• A. Sycon
• B. Leucosolenia
• C. Spongilla
• D. Euplectella

Explanation: Spongilla is the only freshwater sponge among the options provided. It is typically found in clean lakes and slow-moving streams.

• A. Amoeba
• B. Earthworms
• C. Grasshoppers
• D. Man

Explanation: Grasshoppers have an open circulatory system with a heart. Their blood just bathes over their cells.

• A. Digitgrade
• B. Unguligrade
• C. Plantigrade

Explanation: A digitgrade is defined as those group of mammals that solely walk on their toes only and not touching the ground with their heels for…

• A. Ascaris
• B. Neresis
• C. Trichinella
• D. Guinea worm

Explanation: Nematodes are free living or parasite, and live in soil, roots, human and animal intestine and muscles.

• A. Insecta
• B. Arachnida
• C. Myriapoda
• D. Crustacean

Explanation: Crustaceans form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill…

• A. Marsupials
• B. Eutherians
• C. Monotremes
• D. Metatherians

Explanation: Monotremes are considered the connecting link between reptiles and mammals because they exhibit both reptilian features, such as laying…

• A. Clam worm
• B. Silver Fish
• C. Leach
• D. Spider

Explanation: book lung, form of respiratory organ found in certain air-breathing arachnid arthropods (scorpions and some spiders).

• A. Parazoa
• B. Metazoa
• C. Sporozoa
• D. Monera

Explanation: The correct answer is Sporozoa. Protozoa are unicellular organisms that lack tissue level organization, while Sporozoa specifically…

• A. Insecta
• B. Annelida
• C. Crustacean
• D. Arachinda

Explanation: Crustacean: This is the correct option. Daphnia belongs to the class Crustacea within the phylum Arthropoda.

• 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.

• 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…

• 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.

• 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.

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

Explanation: Metatheria: Opossum belongs to the Metatheria, also known as marsupials.