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. Cyclostomata
- B. Osteichthyes
- C. Chondrichthyes
- D. Tetrapoda
Explanation: Chondrichthyes are cartilagenous fishes having exoskeleton of cartilage. Skates and rays are cartilagenous fishes.
Correct answer: Chondrichthyes- A. Hydra
- B. Cockroach
- C. Birds
- D. Both A and B
Explanation: Hydra has neither blood and blood vessels, nor organs of excretion and respiration, which are carried on individually by each cell.
Correct answer: Hydra- A. Plasmodium
- B. Anopheles
- C. Trypanosoma
- D. Insects
Explanation: African trypanosomiasis, also called sleeping sickness, is a disease caused by a parasite.
Correct answer: Trypanosoma- A. Crustacea
- B. Myriapoda
- C. Insecta
- D. Arachnida
Explanation: Book lungs are a rudimentary type of lung typically found in arachnids, such as scorpions and spiders, and in horseshoe crabs.
Correct answer: Arachnida- A. Homcothermic
- B. Poikilothermic
- C. Hair
- D. Four chambered heart
Explanation: Hair is a defining characteristic of mammals. Most mammals have hair or fur covering some or all of their bodies.
Correct answer: Hair- A. Colon
- B. Small Intestine
- C. Liver
- D. Bile Duct
Explanation: Fasciola (Liver luke) : It is an endoparasite in sheep and occasionally in human beings.
Correct answer: Bile Duct- A. Plasmodium
- B. House Fly
- C. Anopheles
- D. Tsetse Fly
Explanation: Trypanosoma, the cause of sleeping sickness and skin diseases. The common house ly carries disease causing organisms to contaminate food…
Correct answer: Tsetse Fly- A. Coelom
- B. Endoderm
- C. Mesoderm
- D. Mesoglea
Explanation: The coelom is a body cavity found in many animals, including vertebrates.
Correct answer: Coelom- A. Cartilaginous fishe
- B. Reptiles
- C. Dipnoi
- D. Cyclostomata
Explanation: Dipnoi, also known as lungfishes, are a group of fish that can breathe air and are adapted to survive in oxygen-poor water.
Correct answer: Dipnoi- A. Reptiles
- B. Amphibian
- C. Birds
- D. Mammals
Explanation: In amphibians, the embryo is not surrounded by an amnion. The amnion is a membrane that forms a fluid-filled sac around the embryo in…
Correct answer: Amphibian- A. Robin
- B. Kestrel
- C. Eagle
- D. Kingfisher
Explanation: In Kingfishers, both ovaries and oviducts are functional.
Correct answer: Kingfisher- A. Reptiles & mammals
- B. Reptiles & birds
- C. Birds & mammals
- D. Amphibian and fishes
Explanation: Archaeopteryx is considered a connecting link between reptiles and birds due to its combination of reptilian and avian features.
Correct answer: Reptiles & birds- A. Gonozooids
- B. Gastrozooids
- C. Astrozoids
- D. Medusazoids
Explanation: Gastrozooids are specialized feeding zooids in some coelenterates (such as certain colonial cnidarians like hydroids).
Correct answer: Gastrozooids- A. Large variety of organism
- B. Malpighian tubules
- C. Chondrichthyes
- D. Mammals
Explanation: Arthropods exhibit an incredible diversity of organisms, including insects, arachnids, crustaceans, and more.
Correct answer: Large variety of organism- A. Reptiles
- B. Amphibian
- C. Chondrichthyes
- D. Mammals
Explanation: Chromatophores are pigment cells present in amphibians like frogs, salamanders, and newts.
Correct answer: Amphibian- A. Archaeopteryx
- B. Duckbill platypus
- C. Varanope
- D. Opossum
Explanation: Varanope is a mammal-like reptile fossil found in Texas. It belongs to a group known as varanopids, which were early synapsids, a lineage…
Correct answer: Varanope- A. Absorption of blood
- B. Attachment
- C. Ingestion of food
- D. Excretion of waste
Explanation: Suckers in various organisms, such as in insects or parasites like leeches, are specialized structures primarily designed for attachment.
Correct answer: Attachment- A. Arthropoda
- B. Echinodermata
- C. Porifera
- D. Chordata
Explanation: Animals of the phylum Arthropoda exhibit schizocoelous development, which involves the splitting of the mesoderm to form a coelom.
Correct answer: Arthropoda- A. Cyclostomes
- B. Chondrichthyes
- C. Osteichthyes
- D. Amphibians
Explanation: Osteichthyes, which include bony fish, do have a swim bladder. The swim bladder is a gas-filled sac that helps fish to control their…
Correct answer: Osteichthyes- A. Viviparous
- B. Have placenta
- C. Right aortic arch
- D. Mammary glands
Explanation: Mammary glands are a characteristic of all mammals. These specialized glands produce milk, which is used to nourish and feed the young.
Correct answer: Mammary glands