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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- A. Haemoglobin
- B. None
- C. Hemocyanin
- D. Hemolymph
Explanation: Haemoglobin is an oxygen carrying respiratory pigment found in chordates. It is found in the erythrocytes of these animals.
Correct answer: Haemoglobin- A. Pidgeon
- B. Elephant
- C. Sheep
- D. Humans
Explanation: Option A is correct since oviparous animals are animals that produce young using eggs that are hatched after they have been laid by the…
Correct answer: Pidgeon- A. Amphibians
- B. Birds
- C. Mammals
- D. Reptiles
Explanation: Reptile eggs, including those of snakes and many turtles, are characterized by their leathery shells, which are flexible and often adhere…
Correct answer: Reptiles- A. Earthworm
- B. Cockroach
- C. Butterfly
- D. Sting ray
Explanation: Option D is correct since stingray is a deuterostome.Option A is incorrect since the earthworm is an annelid that belongs to the…
Correct answer: Sting ray- A. Muscles
- B. Hydrostatic skeleton
- C. Parapodia
- D. Setae
- E. A,C and D
Explanation: All annelids except leeches also have chitonous hair-like structures, called setae, projecting from their cuticle.
Correct answer: A,C and D- A. Mollusca
- B. Echinoderms
- C. Flatworms
- D. Sponges
Explanation: Echinoderms exhibit both radial and bilateral symmetry. During larval stages, echinoderms have bilateral symmetry whereas they have…
Correct answer: Echinoderms- A. They show bilateral symmetry
- B. They show both radial and bilateral symmetry
- C. They are all protostomes
- D. They are all deuterostomes
Explanation: Triploblastic animals are characterized by having three primary germ layers: ectoderm, mesoderm, and endoderm.
Correct answer: They show bilateral symmetry- A. Prawn has one pairs of antennae
- B. Nematocysts are characteristics of the phylum cnidaria
- C. Millepedes have two pairs of appendages in each segment of the body
- D. Animals belonging to phylum porifera are marine and fresh water
Explanation: Prawns have two pairs of antennae, one on either side, just below the antennules. They are sensory, excretory, and balancing in function.
Correct answer: Prawn has one pairs of antennae- A. Running birds
- B. Migratory birds
- C. Flightless birds
- D. Four-toed birds
Explanation: The ostrich, penguin, and kiwi are all flightless birds. This category best captures their shared trait of being unable to fly, though…
Correct answer: Flightless birds- A. Sac type digestive system
- B. Well-developed respiratory system
- C. Parenchyma fills the body space
- D. Well-developed excretory system
Explanation: The correct answer is Option B: Well-developed respiratory system. Acoelomates, such as those in Phylum Platyhelminthes, lack a…
Correct answer: Well-developed respiratory system- A. Coelom
- B. Gastrocoel
- C. Pseudocoelom
- D. Spongocoel
Explanation: The coelom is a true body cavity that is entirely lined by mesodermal tissue, providing space for the development and suspension of…
Correct answer: Coelom- A. Pinworm
- B. Starfish
- C. Cake urchin
- D. Amphioxus
Explanation: Spiral and determinate cleavage is a feature of protostomes, a group that includes organisms such as annelids, mollusks, and nematodes.
Correct answer: Pinworm- A. Bilaterally symmetrical
- B. Triploblastic metazoan
- C. Dorsoventrally compressed body
- D. Radially symmetrical body
Explanation: The correct answer is 'Radially symmetrical body'. Phylum Platyhelminthes is characterized by bilateral symmetry, meaning there is only…
Correct answer: Radially symmetrical body2754. Platyhelminthes means:
- A. Flat worms
- B. Roundworms
- C. Segmented worms
- D. None
Explanation: Word Platyhelminthes (derived from the Greek platy, meaning "flat" while helminth meaning "worm") are a phylum of relatively simple…
Correct answer: Flat worms- A. Robin
- B. Kestrel
- C. Eagle
- D. Kiwi
Explanation: The kiwi is the best-known example of a bird in which both ovaries are functional.Kiwis are primitive, flightless birds (ratites), and…
Correct answer: Kiwi- A. Dugesia
- B. Schistostoma
- C. Fasciola
- D. Taenia
Explanation: Taenia: Has proglottids. Taenia is a type of tapeworm, and proglottids are segments of its body containing reproductive organs.
Correct answer: Taenia- A. Hydrocarbons
- B. Organic molecules
- C. Chemicals
- D. All of these
Explanation: An animal's survival does depend on its ability to take chemicals from the environment.
Correct answer: Chemicals- A. Muscle tissues
- B. Hydrostatic skeleton
- C. Parapodia
- D. Bones
Explanation: The locomotory organs in annelids include parapodia, suckers, and setae. Annelids are segmented worms that belong to the phylum Annelida.
Correct answer: Parapodia- A. Triploblastic
- B. Bilateral Symmetry
- C. Coelomate
- D. Flatworms
Explanation: Platyhelminthes are not coelomates; instead, they are acoelomates. They lack a true body cavity between the body wall and the digestive…
Correct answer: Coelomate- A. Peritandrous
- B. Pertandrous
- C. Protonema
- D. Protandrous
Explanation: Protandry is a reproductive strategy where an organism starts as a male and later becomes a female.
Correct answer: Protandrous