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. Ectodermal
- B. Mesodermal
- C. Endodermal
- D. None of these
Explanation: The endoderm is the innermost primary germ layer, and it is the one responsible for giving rise to the epithelial lining of the digestive…
Correct answer: Endodermal- A. Chondrichthyes
- B. Osteichthye
- C. Cyclostomata
- D. Both A and B
Explanation: Cyclostomata have an eel-like body because their shape is long, slender, and cylindrical, resembling that of an eel.This body form helps…
Correct answer: Cyclostomata- A. Echinodermata
- B. Annelida
- C. Arthropoda
- D. Cnidaria
Explanation: The water vascular system is a hydraulic system unique to the phylum Echinodermata.
Correct answer: Echinodermata- A. Honey bee
- B. Silk worm
- C. Locust
- D. Insects for pollination
Explanation: Among the insects listed, locusts are not beneficial to humans. Locusts are notorious for forming large swarms that can devastate crops…
Correct answer: Locust- A. Euplectella
- B. Spongilla
- C. Leucosolenia
- D. Scolymastra joubini
Explanation: Anoxycalyx ( scolymastra) joubini is the largest and most conspicuous sponge in the Antarctica and although it has been observed as much…
Correct answer: Scolymastra joubini- A. Marine habitat
- B. Spiny skin
- C. Water vascular system
- D. All of these
Explanation: Echinoderms are exclusively marine, they have spiny skin and they possess water vascular system for locomotion and transportation.
Correct answer: All of these- A. Myriapods
- B. Mollusca
- C. Echinoderms
- D. Cnidaria
Explanation: The explanation for this question will be added soon!Radula is an anatomical structure used by the molluscs for the mechanical food…
Correct answer: Mollusca- A. Chondrichthyes
- B. Osteoichthyes
- C. Cyclostomata
- D. Both A and B
Explanation: Cyclostomata belong to the phylum chordates and superficially it has an eel like resemblance.
Correct answer: Cyclostomata- A. Flesh fly
- B. Trantula
- C. Blue-ringed octopus
- D. Hummingbird
Explanation: A tetrapod is a vertebrate animal that has four limbs. This includes amphibians, reptiles, birds, and mammals.
Correct answer: Hummingbird- A. Endoderm
- B. Epidermis
- C. Mesoderm
- D. Ectoderm
Explanation: Animals that are diploblastic only have two germ layers: ectoderm and endoderm. The mesoderm is missing in diploblastic animals.
Correct answer: Mesoderm- A. Animals
- B. Bacteria
- C. Pinetree
- D. Spirogyra
Explanation: Only animals do not contain chloroplasts and cannot synthesize. All the other options can.
Correct answer: Animals- A. Metatheria
- B. Prototheria
- C. Eutheria
- D. None of the above
Explanation: Metatheria are group of organisms that give birth to underdeveloped yound, that complete their developement in a pouch on the mother's…
Correct answer: Metatheria1413. Most flatworms are:
- A. Endoparasite
- B. Ectoparasite
- C. Pesuodparasite
- D. External parasite
Explanation: Most flatworms are endoparasite i.e. they live inside the body of their host. Some flatworms, on the other hand are free-living.
Correct answer: Endoparasite- A. Segmented body
- B. Closed circulatory system
- C. Muscular foot
- D. All of the above
Explanation: Mollusca is a phylum of invertebrates that are characterized by a soft, unsegmented body, a mantle, a visceral mass, and a foot.
Correct answer: Muscular foot- A. Echinodermata
- B. Annelida
- C. Arthropoda
- D. Mollusca
Explanation: Polychaeta are present in Annelida. polychaetes are a class of annelids, called Polychaeta, and they are one of the main groups within the…
Correct answer: Annelida- A. All animals are Ingestive heterotrophs
- B. All animals are eukaryotes
- C. It is largest kingdom
- D. All animals develop from two dissimilar gametes
Explanation: "All animals develop from two dissimilar gametes" is not a characteristic of the kingdom Animalia.
Correct answer: All animals develop from two dissimilar gametes- A. Birds
- B. Human
- C. Frog
- D. None of these
Explanation: The answer is birds. Birds, reptiles, and some insects excrete uric acid,Uric acid is a less toxic form of nitrogenous waste than ammonia…
Correct answer: Birds- A. Arthropoda
- B. Mollusca
- C. Annelids
- D. Platyhelminthes
Explanation: The phylum Arthropoda is considered the largest phylum in the animal kingdom, with over 1.5 million known species.
Correct answer: Arthropoda1419. Jelly fish belong to:
- A. Deuterostomes
- B. Protostomes
- C. Triploblastic
- D. Diploblastic
Explanation: Due to having a simple body and a radial symmetry, Jelly fish belong to diploblastic group. This is correct.
Correct answer: Diploblastic- A. Prototheria
- B. Methatheria
- C. All mammals
- D. Eutheria
Explanation: The development of the placenta in eutherian animal occurs during the fetal stage rather than the embryonic stage.
Correct answer: Eutheria