Free Kingdom Animalia MCQs with Answers
912 Kingdom Animalia MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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912 questions · page 38 of 46
- A. Porocytes
- B. Pinacocytes
- C. Choanocytes
- D. Amoebocytes
Explanation: The correct answer is amoebocytes. Amoebocytes are crucial in sponges for producing skeletal structures, as they secrete the materials…
Correct answer: Amoebocytes- A. Kidneys
- B. Protonephridia
- C. Metanephridia
- D. Protostomium
Explanation: Earthworms excrete waste through a system of structures called metanephridia.
Correct answer: Metanephridia- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The correct order is polyp, medusa, egg, planula larva, polyp because the polyp produces medusae, the medusa releases eggs, the eggs…
Correct answer: Option A- A. Annelida
- B. Mollusca
- C. Nematoda
- D. Arthropoda
Explanation: The correct answer is Annelida. Animals in this phylum, such as earthworms, possess a closed circulatory system where blood circulates…
Correct answer: Annelida- A. frog
- B. lizard
- C. kiwi
- D. kangaroo
Explanation: The presence of shelled eggs, dry skin, and internal fertilization are evolutionary adaptations primarily observed in amniotes, a group of…
Correct answer: lizard- A. heterocercal tail
- B. 5-7 pairs of gills
- C. cartilaginous endoskeleton
- D. operculum over gills
Explanation: Chondrichthyes do not possess an operculum over their gills like bony fish (Osteichthyes) do.
Correct answer: operculum over gills747. Some animals like fiddler crab, busiest during the time of either dawn or dusk or both are called
- A. Diurnal animals
- B. Nocturnal animals
- C. Crepuscular animals
- D. Circadian animals
Explanation: In zoology, a crepuscular animal is one that is active primarily during the twilight period, being matutinal, vespertine/vespertinal, or…
Correct answer: Crepuscular animals- A. Learning
- B. Innate
- C. Imprinting
- D. Altruism
Explanation: Innate behaviors are instinctual and are present in animals from birth.
Correct answer: Innate- A. All mammals are viviparous
- B. All cyclostomes do not possess jaws and paired fins
- C. All reptiles have a three chambered heart
- D. All pisces have gills covered by an operculum
Explanation: All cyclostomes lack true jaws and paired fins. Cyclostomes are jawless fish characterized by their round, sucker-like mouths for feeding…
Correct answer: All cyclostomes do not possess jaws and paired fins- A. Hydra
- B. Obelia
- C. Aurelia
- D. All of these
Explanation: Metagenesis or alternation between polyp and medusa forms is a characteristic feature of phylum cnidaria.
Correct answer: Hydra- A. Dugesia
- B. Fasciola
- C. Taenia
- D. All of these
Explanation: Option Ais correct.Yes, Dugesia is a free-living example of Platyhelminthes.
Correct answer: Dugesia- A. polyps
- B. Medusae
- C. Both A and B
- D. None of these
Explanation: Polyps are sessile, or attached, zooids in cnidarians. They are typically cup-shaped and have tentacles that they use to capture prey.
Correct answer: Medusae- A. Excretory system
- B. Digestive system
- C. Circulatory system
- D. Nervous system
Explanation: The circulatory system in annelids is segmentally arranged with segmental vessels distributing blood along the body segments.
Correct answer: Circulatory system- A. The alimentary canal is formed from the endodermal cells
- B. The alimentary canal has a single opening
- C. The alimentary canal is sac-like
- D. All of these
Explanation: All three statements correctly describe the alimentary canal of Hydra.
Correct answer: All of these- A. Tentacles
- B. Palps
- C. Eyes
- D. Both B and C
Explanation: This is correct as polychaetes have sensory palps and they have well developed eyes with photoreceptors.
Correct answer: Both B and C- A. Pseudocoelom
- B. Enterocoelom
- C. Schizocoelom
- D. Both a and b
Explanation: An enterocoelom is a true coelom that develops from the archenteron during embryonic development.
Correct answer: Enterocoelom- A. Separate layer of cells
- B. Structure formed from them
- C. Their function in body
- D. Structure associated with them
Explanation: 3 different structures are formed the 3 layers in triploblast after embryonic developement.
Correct answer: Structure formed from them- A. Penguin is homeothermic while the remaining three are poikilothermic
- B. Leech is a freshwater form while all others are marine
- C. Spongilla has special collared cells called choanocytes which are not found in the remaining three
- D. All are bilaterally symmetrical.
Explanation: Spongilla is a common, widely distributed fresh water sponge belonging to phylum porifera.
Correct answer: Spongilla has special collared cells called choanocytes which are not found in the remaining three- A. Diploblastic
- B. Acoelomate
- C. Triploblastic
- D. Pseudocoelomate
Explanation: Grade radiata animals, such as those in the phylum Cnidaria, are diploblastic, meaning they develop from two primary germ layers: the…
Correct answer: Diploblastic- A. Coelomic Epithelium
- B. Ectoderm
- C. Visceral mesoderm
- D. Parietal Mesoderm
Explanation: In coelomates, the mesoderm splits to form the coelom. The visceral layer of mesoderm surrounds the endoderm (gut), while the parietal…
Correct answer: Visceral mesoderm