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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2541. Algae are:
- A. Unicellular organisms only
- B. Filamentous organisms only
- C. Ranges from unicellular to filaments to huge multicellular organisms only
- D. Simple acellular organisms
- E. Ranges from unicellular to filaments to huge multicellular organisms
Explanation: Algae exhibit a wide range of forms, including unicellular, colonial, filamentous, and multicellular structures.
Correct answer: Ranges from unicellular to filaments to huge multicellular organisms- A. Carbohydrates
- B. Starch & Lipids
- C. Proteins
- D. Lipids
Explanation: In the case of Euglena, the flexible pellicle that envelops its body is primarily made of proteins.
Correct answer: Proteins- A. Two
- B. Three
- C. Four
- D. Five
Explanation: Phylum protozoa is classified into 4 classes: Rhizopoda, Mastigophora, Sporozoa, and Ciliata.
Correct answer: Four2544. Rhodophyta belong to:
- A. Algae, Protista
- B. Zygomycota, Fungi
- C. Zooflagellates, Protista
- D. Slime molds, Protista
Explanation: Rhodophyta, commonly known as red algae, are classified under the kingdom Protista.
Correct answer: Algae, Protista- A. Eukaryotic cell and blastula
- B. Prokaryotic cell and no blastula
- C. Eukaryotic cell and no embryo
- D. Prokaryotic cell and no embryo
Explanation: Protists are eukaryotic and, unlike plants and animals, they do not develop from embryos.
Correct answer: Eukaryotic cell and no embryo- A. Stellate
- B. Cup-shaped
- C. Collar shaped
- D. Spiral
Explanation: Chlamydomonas has a single, large, cup-shaped chloroplast which is typical of many unicellular green algae.
Correct answer: Cup-shaped- A. Porphyra
- B. Enzymes
- C. Fat
- D. Starch
Explanation: Pyrenoids are the centers for the formation of starch. They are commonly found in certain photosynthetic protists, such as algae.
Correct answer: Starch- A. Their diverse body form
- B. Types of reproduction
- C. Modes of nutrition and lifestyles
- D. All of these
Explanation: Protoctista is unique due to its diverse body forms, various reproductive types, and multiple nutritional modes.
Correct answer: All of these- A. Fungi
- B. Plantae
- C. Animalia
- D. All of these
Explanation: Protists are considered ancestors of fungi, plants, and animals in evolutionary history.
Correct answer: All of these- A. Single celled protozoa
- B. Unicellular or multicellular algae
- C. Slime molds and choanocytes
- D. Cyanobacteria
Explanation: Cyanobacteria are prokaryotes and belong to Kingdom Monera, not Protista.
Correct answer: Cyanobacteria- A. Actinopods
- B. Dinoflagellates
- C. Zooflagellates
- D. Ciliates
Explanation: Dinoflagellates are autotrophic/algal protists, not protozoa.
Correct answer: Dinoflagellates- A. Most primitive of all eukaryote-like forms
- B. Obtains energy from methanogenic bacteria
- C. Contains all eukaryotic organelles
- D. Contribute to degradation of organic molecule
Explanation: Giant amoeba is a primitive eukaryote that contains all eukaryotic organelles and helps in the degradation of organic matter.
Correct answer: Contains all eukaryotic organelles- A. Pheophyta
- B. Rhodophyta
- C. Euglenophyta
- D. Chlorophyta
Explanation: The mismatched pair is Euglenophyta, because euglenoids are mainly classified based on storage products and body form, not pigments.
Correct answer: Euglenophyta- A. Blades
- B. Stipes
- C. Anchoring holdfast
- D. Rhizopus
Explanation: Rhizopus is a fungus, not a structure found in brown algae.
Correct answer: Rhizopus- A. Virus
- B. Bacteria
- C. Plasmodium
- D. Sponge
Explanation: Plasmodium belongs to the kingdom Protozoa which are Eukaryotes and are microscopic.
Correct answer: Plasmodium- A. Protein coat
- B. Cell membrane
- C. Membrane-bound organelles
- D. Endoplasmic reticulum
- E. Mitochondrial DNA
Explanation: All viruses possess a protein coat, also known as a capsid, which encloses their genetic material.
Correct answer: Protein coat2557. Viruses are:
- A. Always viewed with a light microscope
- B. Are an enzyme-nucleus mixture
- C. Obligate, intracellular parasites
- D. Cellular
- E. Host independent
Explanation: Viruses are obligate, intracellular parasites, which means they require a host cell to reproduce and carry out their life cycle.
Correct answer: Obligate, intracellular parasites- A. Cellular slime molds
- B. Ciliates
- C. Dinoflagellates
- D. Euglenoids
- E. Apicomplexans
Explanation: Apicomplexans have no means of motility. They are parasites that are transferred among hosts by the activities of the hosts.
Correct answer: Apicomplexans- A. Sarcodina
- B. Flagellata
- C. Ciliata
- D. Suctoria
- E. Sporozoa
Explanation: The flagellates are generally considered to be the basic stock from which evolved not only other kinds of protozoa but also higher plants…
Correct answer: Flagellata- A. Ulva
- B. Euglena
- C. Slime Mold
- D. Common Mold
- E. Suctoria
Explanation: Common Molds belong to the Kingdom Fungi.
Correct answer: Common Mold