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 29 of 46
- A. Flatworms
- B. Roundworms
- C. Segmented worms
- D. None of the above
Explanation: Flatworms are known as Platyhelminthes. Free-living flatworms are mostly predators, and live in water or in shaded, humid terrestrial…
Correct answer: Flatworms- A. Penguin
- B. Bat
- C. Whales
- D. Elephant
Explanation: Penguins are oviparous, which means they lay eggs. Penguins lay eggs and incubating them.
Correct answer: Penguin- A. Deuterostomes
- B. Hemichordates
- C. Proterostomes
- D. Platyhelminthes
Explanation: Coelomates are animals that have a true coelom - a fluid-filled body cavity completely lined with mesoderm.
Correct answer: Platyhelminthes- A. Presence of true coelom and metamerism
- B. Absence of true coelom and metamerism
- C. Presence of true coelom but the absence of metamerism
- D. Absence of true coelom but presence of metamerism, is also incorrect because Ascaris lacks metamerism as well.
Explanation: Ascaris does not have a true coelom. Ascaris is an example of a pseudocoelomate organism.
Correct answer: Absence of true coelom and metamerism565. Which of the following invertebrate phyla consists of the most abundant species on planet Earth:
- A. Porifera
- B. Cnidaria
- C. Arthropoda
- D. Mollusca
Explanation: It is correct as Arthropoda is the phylum of animals that includes insects, spiders, crustaceans, and many other types of animals.
Correct answer: Arthropoda- A. Flat worms
- B. Annelida
- C. Cnidaria
- D. Sponge
Explanation: Sponges are the only multicellular animals without a nervous system. They do not have any nerve cells or sensory cells.
Correct answer: Sponge- A. Rudimentary network of nerves
- B. Symmetry
- C. Cnidocytes
- D. Cellular organization
Explanation: The development of an enteron and a rudimentary network of nerves in cnidarians is the first evolutionary step towards formation of the…
Correct answer: Rudimentary network of nerves- A. Detritivores
- B. Fluid feeder
- C. Macrophagous
- D. Microphagous
Explanation: Earthworms are detritivores because they primarily feed on dead organic matter.
Correct answer: Detritivores- A. Phylum Porifera
- B. Phylum Cnidaria
- C. Phylum Platyhelminthes
- D. Phylum Echinodermata
Explanation: In cnidarians, there is only one cavity, which serves as a digestive as well as a body cavity, which is called the gastrovascular cavity…
Correct answer: Phylum Cnidaria- A. Cnidarians
- B. Nematodes
- C. Annelids
- D. Sponges
Explanation: The body of Annelids is called metamerically segmented. Annelids are a group of worms, including earthworms and leeches, that exhibit…
Correct answer: Annelids- A. Excretion
- B. Respiration
- C. Digestion
- D. Circulation
Explanation: Option A is correct.The green glands found in arthropods are concerned with excretion.
Correct answer: Excretion- A. Lips
- B. Teeth
- C. Stomach
- D. Pharynx
Explanation: Option D is correct.In phylum Aschelminths (Nematoda), the nervous system consists of a nerve ring which encircles the pharynx.
Correct answer: Pharynx- A. Cetacea
- B. Pholidote
- C. Chiroptera
- D. Proboscidea
Explanation: Option A is correct.Aquatic mammals belong to the order Cetacea. Cetaceans are a group of marine mammals that includes whales, dolphins…
Correct answer: Cetacea- A. Arthropods
- B. Annelids
- C. Nematodes
- D. Platyhelminthes
Explanation: Animals with pointed ends and a tube-like digestive tract are typically roundworms (phylum Nematoda)
Correct answer: Nematodes- A. Placoid scales
- B. Cycloid scales
- C. Ctenoid scales
- D. Ganoid scales
Explanation: This is the correct answer. Elasmobranchs, which include sharks, rays, and skates, have a unique type of exoskeleton called placoid…
Correct answer: Placoid scales- A. 7.05
- B. 7.75
- C. 7.35
- D. 7.25
Explanation: The normal pH of human blood is slightly basic, around 7.35- 7.45. This pH is maintained by buffer systems like bicarbonate to ensure…
Correct answer: 7.35- A. Excretion
- B. Digestion
- C. Defense
- D. Respiration
Explanation: In Coelenterates (also known as Cnidarians), such as jellyfish, corals, and sea anemones, the endoderm (also known as the gastrodermis) is…
Correct answer: Digestion- A. Bacteria
- B. Protists
- C. Fungi
- D. Plants
Explanation: Parazoa is a subkingdom of animals that includes simple multicellular organisms, such as sponges (Phylum Porifera).
Correct answer: Protists- A. Nephron
- B. Protonephridia
- C. Metanephridia
- D. Malpighian tubes
Explanation: Malpighian tubules are the primary excretory organs in arthropods, including:1. Insects (e.g., beetles, flies, bees)2.
Correct answer: Malpighian tubes- A. Arthropoda
- B. Annelida
- C. Coelantrata
- D. Echinodermata
Explanation: Alternation of generations is a life cycle characteristic of the phylum Cnidaria, which includes Jellyfish,Corals,Sea anemones,Hydra
Correct answer: Coelantrata