Free Kingdom Animalia MCQs with Answers

851. Which of the following is a homoeothermic animal?

• 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. they are warm blooded animals which include Birds, humans and other mammals.

852. Which of these is a fresh water sponge?

• 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. In contrast, Sycon, Leucosolenia, and Euplectella are marine sponges that inhabit different types of saltwater environments. Sycon and Leucosolenia are commonly found in shallower marine waters, whereas Euplectella, known as the glass sponge, is often located in the deep ocean.

853. Which animal posesses an open circularity system?

• 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.

854. Which of the following group of animals run very fast?

• 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 example dogs, cats etc. They are faster than any other group of animals. The word digit comes from a latin word "digitus" meaning toes, fingers while the word "grade" means walking.

855. All of the following are nematodes except:

• 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. Most roundworms are less than five cm in length and many are microscopic but some parasitic roundworms are more than one meter in length.

856. Daphnia belongs to the class:

• 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, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. A crustacean has the following features: • a segmented body with a hard exterior (known as an exoskeleton) • jointed limbs, each often with two branches (termed biramous) • two pairs of antennae. • gills.

857. The mammals terming connecting link between reptilian and mammals?

• 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 eggs, and mammalian features, like producing milk to feed their young. The platypus and echidna are examples of living monotremes. Marsupials, eutherians, and metatherians do not share this unique combination of reptilian and mammalian characteristics, making them incorrect answers.

858. In which of the following book lungs are found?

• 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).

859. Tissue organization is missing in protozoa and found in:

• 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 exhibit protoplasmic level organization without true tissues. Parazoa and Metazoa are multicellular but also lack true tissues, and Monera are primitive unicellular organisms without tissue level organization.

860. Daphnia belongs to:

• 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. Crustaceans include various aquatic arthropods, such as crabs, lobsters, shrimp, and Daphnia, commonly known as water fleas. The other options are incorrect because Daphnia is not an insect (Option A), segmented worm (Option B), or arachnid (Option D). It is specifically classified as a crustacean within the phylum Arthropoda.