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. Coelenterate and Platyhelminthes
- B. Arthropoda and Mollusca
- C. Porifera and coelenterata
- D. Coelenterata and Echinodermata
Explanation: Radial symmetry is found in Coelenterates and Echinodermata. Radial symmetry is a type of symmetry in which an organism can be divided…
Correct answer: Coelenterata and Echinodermata- A. Snake
- B. Cow
- C. Mantis shrimp
- D. Human
Explanation: Mantis shrimp are not tetrapods. Tetrapods are vertebrates that have four limbs. This includes mammals, birds, reptiles, and amphibians.
Correct answer: Mantis shrimp- A. Flat worms
- B. Round worms
- C. snails
- D. Chordates
Explanation: Flatworms and cnidarians are the only animals in the list that have three germinal layers but no coelom.
Correct answer: Flat worms- A. Nematodes
- B. Annelids
- C. Arthropods
- D. Molluscs
Explanation: The first groups of invertebrates which have developed a closed circulatory system are Annelids.
Correct answer: Annelids- A. Body is bilaterally symmetrical
- B. Both aquatic and land species breathe through lungs
- C. Triploblastic and acoelomates
- D. All of the above
Explanation: Body is bilaterally symmetrical is the only statement that is true about gastropods.
Correct answer: Body is bilaterally symmetrical- A. Osteichthyes-a bony endoskeleton & gills covered by operculum
- B. Reptilia-lefi aortic arch & internal fertilization
- C. Nematoda-triploblastic & acoelomates
- D. Cephalopods-dorsal nerve cord & bilateral symmetry
Explanation: The correct combination of class and its description is Osteichthyes-a bony endoskeleton & gills covered by operculum.
Correct answer: Osteichthyes-a bony endoskeleton & gills covered by operculum- A. Gastropoda
- B. Cephalpoda
- C. Myriapoda
- D. None of these
Explanation: The common examples are: i. Helix aspersa : It is commonly termed garden snail.
Correct answer: Gastropoda- A. Sycon
- B. Leucosolenia
- C. Spongilla
- D. Euplectella
Explanation: Euplectella is called Venus Flower Basket.
Correct answer: Euplectella- A. Bony fish
- B. Fish like mammals
- C. Cartilaginous fish
- D. All of these
Explanation: The explanation for this question will be added soon!
Correct answer: All of these- A. Echinodermata
- B. Arthropoda
- C. Mollusca
- D. Both B and C
Explanation: Both option B and C are correct as they are not deuterostomes.
Correct answer: Both B and C- A. Closed circulatory system
- B. Nitrogenous waste product is uric acid
- C. Ventral nerve cord
- D. None of the above
Explanation: Ventral nerve cord is the common characteristic between both annelids and arthropods.
Correct answer: Ventral nerve cord1012. Polyps are:
- A. Cylindrical and nutritive
- B. Umbrella like and free swimming
- C. Tubular and nutritive
- D. Sessile and involve in sexual reproduction
Explanation: The explanation for this question will be added soon!
Correct answer: Cylindrical and nutritive- A. Protozoa
- B. Porifera
- C. Echinodermata
- D. All of these
Explanation: Echinoderms exhibit a unique form of symmetry known as pentaradial symmetry in their adult stages.
Correct answer: Echinodermata- A. Amphibians
- B. Prototherians
- C. Birds
- D. Reptiles
Explanation: Prototherians (monotremes) lay eggs with a leathery appearance. The eggs of monotremes like the platypus and echidna have a soft, leathery…
Correct answer: Prototherians- A. Green plants
- B. Green algae
- C. Animals
- D. Both A and B
Explanation: The category "animals" includes a wide variety of organisms, and prototherians (monotremes) are one group of animals that are egg-laying…
Correct answer: Animals- A. No prominent head region
- B. Separate sexes
- C. Trochophore larva
- D. Parapodia
Explanation: Oligochaetes, like earthworms, do not have a prominent head region. Their body lacks well-defined sensory structures or appendages at the…
Correct answer: No prominent head region- A. Protozoans
- B. Eumetazoa
- C. Protoctista ancestors
- D. Nematodes
Explanation: Aschelminthes is also known as nematodes, which are a group of worms within the animal kingdom.
Correct answer: Nematodes- A. Nematoda-roundworms, pseudocoelomate
- B. Arthropoda - coelom present, bilateral symmetry
- C. Platyhelminthes - gastrovascular cavity, flatworms, acoelomate
- D. Calcarea-gastrovascular Cavity, coelom present
Explanation: This combination is incorrect. Calcarea is a class of sponges (phylum Porifera), not a phylum on its own.
Correct answer: Calcarea-gastrovascular Cavity, coelom present- A. Arthropods
- B. Hemichordates
- C. Annelids
- D. Molluscs
Explanation: Hemichordata, chordata and echinodermata belong to deuterostomes.
Correct answer: Hemichordates- A. Mechanoreceptors
- B. Reproductive system
- C. Respiratory system
- D. Excretory system
Explanation: The excretory system consists of branching tubes ending in bulb-like cells, the flame cells.
Correct answer: Excretory system