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. Sponges
- B. Cnidarians
- C. Ciliates
- D. Actinopods
Explanation: Choanoflagellates are single-celled organisms that have a distinctive structure featuring a collar of microvilli surrounding a single…
Correct answer: Sponges2602. Protists with two nuclei
- A. Actinopods
- B. Zooflagellates
- C. Ciliates
- D. Apicomplexans
Explanation: Ciliates are a group of protists distinguished by having two types of nuclei: a macronucleus and one or more micronuclei.
Correct answer: Ciliates2603. A sessile ciliate
- A. Radiolarian
- B. Apicomplexan
- C. Stentor
- D. Trichonympha
Explanation: The correct answer is Stentor. Stentor is a sessile ciliate, meaning it is typically attached to substrates in its environment.
Correct answer: Stentor- A. Foraminiferans
- B. Amoebas
- C. Apicomplexans
- D. Ciliates
Explanation: The correct answer is Foraminiferans. Foraminiferans are a group of protozoans that produce shells, often made of calcium carbonate.
Correct answer: Foraminiferans- A. Apicomplexans
- B. Ciliates
- C. Protozoans
- D. Foraminiferans
Explanation: Foraminiferans are single-celled protists with shells made of calcium carbonate.
Correct answer: Foraminiferans2606. Actinopods contain
- A. Cilia
- B. Flagella
- C. Tests
- D. Pseudopodia
Explanation: Actinopods are a group of protists that are characterized by their intricate and delicate skeletons known as tests.
Correct answer: Tests- A. Stentor
- B. Euglena
- C. Radiolarians
Explanation: Radiolarians are a class of protists within the broader group of actinopods.
Correct answer: Radiolarians2608. The cause of malaria is
- A. Amoeba
- B. Paramecium
- C. Chlorella
- D. Plasmodium
Explanation: The correct answer is Plasmodium. Plasmodium is a group of parasitic protozoa that causes malaria in humans.
Correct answer: Plasmodium- A. Myxomycota
- B. Oomycetes
- C. Dinoflagellates
- D. Apicomplexans
Explanation: The correct answer is Apicomplexans. Apicomplexans are a group of protists that are characterized by their ability to form spores…
Correct answer: Apicomplexans- A. White blood cells
- B. Red blood cells
- C. Platelets
- D. All of these
Explanation: Malaria symptoms are caused by the simultaneous bursting of millions of red blood cells, a process induced by the malaria parasite…
Correct answer: Red blood cells- A. Unicellular
- B. Filamentous
- C. Leaf-like extensions
- D. All of these
Explanation: The correct answer is 'All of these'. Algae are a diverse group of organisms that can exhibit various growth forms.
Correct answer: All of these- A. Their pigment composition
- B. Thallus
- C. Mode of reproduction
- D. All of these
Explanation: Algae are classified mainly based on their pigment composition because the pigments determine the absorption of light and thus the…
Correct answer: Their pigment composition- A. A: Euglenophyta
- B. B: Chlorophyta
- C. C: Rhodophyta
- D. D: Phaeophyta
Explanation: The correct answer is Rhodophyta. Rhodophyta, or red algae, are unique among the algae in that they completely lack flagellated or motile…
Correct answer: C: Rhodophyta2614. Euglenoids resemble
- A. Algae
- B. Green plants
- C. Zooflagellates
- D. All these
Explanation: Euglenoids are unique protists that exhibit characteristics of both plants and animals.
Correct answer: All these- A. Dinoflagellates
- B. Diatoms
- C. Kelps
- D. Red algae
Explanation: The correct answer is Dinoflagellates. These protists have a unique cell covering made of interlocking cellulose plates, known as theca…
Correct answer: Dinoflagellates- A. Euglenoids
- B. Dinoflagellates
- C. Green algae
- D. None of these
Explanation: The correct answer is Dinoflagellates. Dinoflagellates are an essential group of protists in marine ecosystems, known for their…
Correct answer: Dinoflagellates- A. The euglenoids
- B. Dinoflagellates
- C. Diatoms
- D. Red algae
Explanation: This question tests knowledge of marine biology and algal blooms, important for medical students in understanding environmental…
Correct answer: Dinoflagellates- A. Dinoflagellates
- B. Diatoms
- C. Brown algae
- D. Red algae
Explanation: The correct answer is Diatoms. Diatoms are a group of algae that have a unique cell wall made of silica, forming two overlapping shells or…
Correct answer: Diatoms- A. The euglenoids
- B. Dinoflagellates
- C. Diatoms
- D. Red algae
Explanation: Diatoms are single-celled algae with silica cell walls, and they are the most prolific producers in aquatic environments.
Correct answer: Diatoms- A. Diatoms
- B. Euglenoids
- C. Dinoflagellates
- D. Kelps
Explanation: The correct answer is Kelps, but this may not seem intuitive as kelps are large brown algae and not typically associated with…
Correct answer: Kelps