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Free Biodiversity and Variety of Life MCQs with Answers

3,130 Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.

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Classification and TaxonomyKingdom ProkaryotaeKingdom ProtistaKingdom FungiKingdom PlantaeKingdom Animalia
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3,130 questions · page 55 of 157

1081. Coelom is a cavity lined by:

  • A. Mesoderm
  • B. Endoderm
  • C. Epiderm
  • D. Ectoderm

Explanation: Option A is correct as coelom is a fluid-filled cavity that is entirely lined by mesoderm.

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Correct answer: Mesoderm

1082. Which one of the following does not have intermediate host?

  • A. Tapeworm
  • B. Ascaris
  • C. Liver fluke
  • D. Plasmodium

Explanation: Organisms that have an intermediate host spend their lifetimes in two different organisms.

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Correct answer: Ascaris

1083. Which of the following is a freshwater sponge?

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

Explanation: Spongilla is a genus of freshwater sponges in the family Spongillidae found in lakes and slow streams.

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Correct answer: Spongilla

1084. Pseudocoelom is actually derived from:

  • A. Blastocoel
  • B. Gastrocoel
  • C. Neurocoel
  • D. Haemocoel

Explanation: A pseudocoelom is a fluid-filled space between the body wall and the digestive tract found in roundworms.

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Correct answer: Blastocoel

1085. Species of Phylum Platyhelminthes are:

  • A. Roundworms
  • B. Flatworms
  • C. Hook worms
  • D. Threadworms
  • E. Pinworms

Explanation: Phylum Platyhelminthes are called flatworms. (Fact)

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Correct answer: Flatworms

1086. A characteristic feature of Echinoderm is:

  • A. Canal system
  • B. Water vascular system
  • C. Tracheal system
  • D. Blood vascular system
  • E. None of these

Explanation: The characteristic of adult echinoderms is the possession of a water vascular system.

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Correct answer: Water vascular system

1087. Which vertebrate groups have scaly skin?

  • A. Amphibians and fish
  • B. Amphibians and mammals
  • C. Fish and mammals
  • D. Fish and reptiles

Explanation: Fish and reptiles have scaly skins, as shown below:

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Correct answer: Fish and reptiles

1088. Archaeopteryx is a transitional stage between the members of which one of the following pairs?

  • A. Amphibian-Bird
  • B. Fish-Amphibian
  • C. Reptile-Mammal
  • D. Reptile-Bird
  • E. Mammal-Man

Explanation: It has long been accepted that Archaeopteryx was a transitional form between birds and reptiles and that it is the earliest known bird.

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Correct answer: Reptile-Bird

1089. Identify the phylum in which the larvae is bilaterally symmetrical but the adult Is radially symmetrical

  • A. Ctenophora
  • B. Coelenterata
  • C. Echinodermata
  • D. Sipunculoidea

Explanation: In Phylum Echinodermata, the adult echinoderms are radially symmetrical but the larvae are bilaterally symmetrical.

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Correct answer: Echinodermata

1090. The adaptive feature(s) which help(s) the fish to live in water include(s):

  • A. A tail and an air bladder
  • B. Unpaired and paired fins
  • C. Streamlined body
  • D. Gills and strong sense of smell
  • E. All of these options

Explanation: All of the above options help fish thrive in their ecosystem. Tail, an air bladder, unpaired and paired fins, a streamlined body for…

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Correct answer: All of these options

1091. What is the correct order of arthropod groups, from those with the most legs to those with the fewest legs?

  • A. Arachnids-Crustaceans-Insects-Myriapods
  • B. Crustaceans-Myriapods-Insects-Arachnids
  • C. Insects-Arachnids-Myriapods-Crustaceans
  • D. Myriapods-Arachnids-Crustaceans-Insects
  • E. Myriapods-Crustaceans-Arachnids-Insects

Explanation: myriapods > crustaceans > arachnids > insects Myriapods have several legs, maybe one or two from each body segment.

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Correct answer: Myriapods-Crustaceans-Arachnids-Insects

1092. Which of the following phyla of Kingdom Animalia do humans belong to?

  • A. Mollusca
  • B. Arthropoda
  • C. Echinodermata
  • D. Chordata

Explanation: Humans belong in the phylum Chordata because of the fact that humans do possess notochord during their development.

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Correct answer: Chordata

1093. Which of the following are animals with pointed ends and a tube-like digestive tract?

  • A. Annelida
  • B. Arthropoda
  • C. Nematoda
  • D. Mollusca

Explanation: Nematodes are known for having tapered ends (i.e. pointy ends). Arthropods, mollusca and annelids are not known or identified by their…

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Correct answer: Nematoda

1094. Select an anamniote from the following:

  • A. Snake
  • B. Parrot
  • C. Frog
  • D. Crocodile

Explanation: Amniotes are tetrapods (descendants of four-limbed and backboned animals) that are characterised by having an egg equipped with an amnion…

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Correct answer: Frog

1095. Class Elasmobranchi have an outer covering of?

  • A. Placoid scale
  • B. Cycloid
  • C. Ctenoid scales
  • D. Epidermal scales

Explanation: The outer covering of Elasmobranchs is placoid. It consists of no continuous covering of scales of ganoid plates, but of more or less…

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Correct answer: Placoid scale

1096. Which group of organisms has the following features? I. Three pairs of jointed legs II. Three-part segmented body III. One pair of antennae

  • A. Arachnids
  • B. Crustaceans
  • C. Insects
  • D. Myriapods

Explanation: Insects are arthropods that have three body segments, three pairs of legs, one pair of antennae, and many have one or two pairs of wings.

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Correct answer: Insects

1097. The table shows some characteristics of four different vertebrates. Which vertebrate is a reptile? ✓= feature present x = feature absent

  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Explanation: Reptiles do not have fins and hairs but they do have scales and legs.

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Correct answer: Option B

1098. All of the following are mammals except the:

  • A. Porpoise
  • B. Shark
  • C. Whale
  • D. Walrus
  • E. Seal

Explanation: Shark is a cartilaginous fish belonging to the class Chondrichthyes. All other options are wrong as they are mammals

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Correct answer: Shark

1099. Which one of the following animals possesses an open circulatory system:

  • A. Amoeba
  • B. Earthworm
  • C. Grasshopper
  • D. Man

Explanation: Among the options provided, the animal that possesses an open circulatory system is the Grasshopper.

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Correct answer: Grasshopper

1100. Which one of following is a true fish?

  • A. Cuttle fish
  • B. Silver fish
  • C. Jelly fish
  • D. Sea fish

Explanation: True fish have a backbone (inner skeletal system of bones), gills they breathe through, & fins & a tail for propulsion.

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Correct answer: Sea fish
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