Free Biodiversity and Variety of Life MCQs with Answers

• 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…

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

Explanation: Nematocysts are specialized structures found in coelenterates, which are multicellular aquatic animals living in colonies.

• 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…

• 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.

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

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

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

Explanation: Sponges are animals that belong to the phylum Porifera. They have a sedentary or sessile lifestyle in their adult stage and are active in…

• A. Amphioxus
• B. Sea horse
• C. Cheatopterus
• D. Sea cucumber

Explanation: Cheatopterus is a genus of trilobite, which is a group of extinct arthropods.

• A. Clam worm
• B. Spider
• C. Silverfish
• D. Leech

Explanation: Book lungs are respiratory organs found in certain arachnids, such as spiders.

• A. Spring sleep
• B. Winter Sleep
• C. Autumn sleep
• D. Summer sleep

Explanation: Aestivation is a term used to describe a state of inactivity or dormancy that certain animals enter during hot or dry periods, typically…

• A. Penguin
• B. Ostrich
• C. Hawk
• D. Kiwi

Explanation: Penguins are swimming birds. They are highly adapted to aquatic life and are known for their ability to swim and drive in the ocean.

• A. Acaelomate
• B. ceolomates
• C. Pseudocoelomates
• D. Deuterostomes

Explanation: A pseudocoelomate is an organism with a body cavity called a pseudocoelem that is not derived from the mesoderm, as in a true coelom, or…

• A. chitin in their exoskeleton
• B. chlicitae
• C. three pairs of legs
• D. two pairs of antennae

Explanation: Crustaceans are the only arthropods with two pairs of antennae, so option D is correct. All arthropods have chitin in their exoskeleton.

• A. spinneret
• B. Carapace
• C. Medriporite
• D. Tube feet

Explanation: Spiders, which belong to the phylum Arthropoda, are predators who trap their prey by producing silk threads.

• A. Cloacas
• B. Bills
• C. Gizzard
• D. chest muscles

Explanation: The shape of the sternum and chest muscles aid birds in flight.

• A. A mammal sucking milk
• B. A dog looking for its food dish
• C. A worm moving away from bright light
• D. A spider spinning a web

Explanation: The correct answer is Option B: 'A dog looking for its food dish.' This behavior is learned because dogs associate the dish with food…

• A. Crustacea
• B. Myriapoda
• C. Arachnida
• D. Hexapoda

Explanation: Spiders belong to the class Arachnida, which includes joint-legged animals like scorpions, ticks, and mites.

• A. Myriapoda
• B. Arychnida
• C. Hexapoda
• D. Crustacean

Explanation: Crustaceans form a very large group of arthropods, which includes crabs, lobsters, crayfish etc.

• A. Bony fishes
• B. Cartllaginous fishes
• C. Lung fishes
• D. Jawless fishes

Explanation: The operculum is a hard, plate-like bony flap that covers the gills of a bony fish protecting the gills and also serves a role in…

• A. Teeth
• B. Sycon
• C. Fresh water mussels
• D. Jelly fish

Explanation: Sycon are sponges that receive food particles with the help of collar cells, therefore are called filter feeders.

• A. Rat
• B. Kangaroo
• C. Duckbilled platypus
• D. Spiny ant eater

Explanation: Viviparous species are those who give birth to living young ones directly instead of laying eggs.