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. Micronuclei
- B. Macronuclei
- C. Sex Pilli
- D. Both A and B
Explanation: During conjugation two ciliates come into contact with each other forming a cytoplasmic bridge between them.
Correct answer: Both A and B- A. Calcium carbonate
- B. Calcium hydroxide
- C. Silica
- D. Chitin
Explanation: Forams are unusual among single-celled organisms because they build shells made up of calcium carbonate (calcareous) or from tiny grains…
Correct answer: Calcium carbonate- A. Spirogyra
- B. Volvox
- C. Diatoms
- D. Kelps
Explanation: Diatoms are the photosynthetic unicellular algae populating the oceans.
Correct answer: Diatoms- A. Green algae
- B. Brown algae
- C. Red algae
- D. All of these
Explanation: The green algae and land plants form a monophyletic lineage (the chlorophytes) that contain both Protista and higher taxa.
Correct answer: Green algae- A. Vacuole
- B. Chloroplast
- C. Cytoplasm
- D. Pyrenoid
Explanation: It is the site of starch formation and storage.
Correct answer: Pyrenoid- A. Red algae
- B. Green algae
- C. Brown algae
- D. Diatom
Explanation: Brown algae include a number of edible seaweeds. Seaweeds use as agricultural fertilizers the extracts from brown algae have increased the…
Correct answer: Brown algae- A. Chlorophyll a
- B. Chlorophyll b
- C. Carotenoids
- D. All of these
Explanation: The chlorophylls of Euglenoids contain chlorophyll a and chlorophyll b. Euglenoids also have some carotenoid pigments.
Correct answer: All of these2488. Flagella is absent in?
- A. Diatoms
- B. Brown algae
- C. Green algae
- D. Red algae
Explanation: Red algae do not have flagella or centrioles during their entire life cycle.
Correct answer: Brown algae- A. Chlorella
- B. Desmid
- C. Chlamydomonas
- D. Spirogyra
Explanation: Desmids, chlorella and spirogyra lack flagella.Chlamydomonas are unicellular algae and have flagella.
Correct answer: Chlamydomonas- A. Crysophyta
- B. Pyrophyta
- C. Rodophyta
- D. Phaeophyta
Explanation: Pinnolaria is a genus fresh water alga more specifically a type of diatom.
Correct answer: Crysophyta- A. Chitin
- B. Protein
- C. Lignin
- D. Cellulose
Explanation: The cell wall of oomycetes, however, is not composed of chitin, as in the fungi, but is made up of a mix of cellulosic compounds and glycan.
Correct answer: Cellulose- A. Uninucleated
- B. Enucleate
- C. True nucleated
- D. Multi nucleated
Explanation: A plasmodium is an amoeboid, multinucleate, and naked mass of cytoplasm of slime mold.
Correct answer: Multi nucleated- A. Plasmodium
- B. Sporophore
- C. Sporangium
- D. Pseudoplasmodium
Explanation: Slime molds form sporangia - clusters of spores, often on the tips of stalks such as in the Sporangium.
Correct answer: Sporangium- A. Amoeboid cells
- B. Biflagellated cells
- C. Swarm cells
- D. All of the above
Explanation: The germinated spore can transform into either an amoeba-like myxamoeba cell or a flagellated swarm cell.
Correct answer: All of the above- A. Physarum polycephalum
- B. Phytophthora infestans
- C. Naegleria polycephalum
- D. Phytophthora polycephalum
Explanation: The Irish Potato famine is also known as the Great Hunger, began in 1845 when a fungus-like organism called Phytophthora infestans, spread…
Correct answer: Phytophthora infestans- A. Slime mold
- B. Plant
- C. Oomycota
- D. Algae
Explanation: Oomycote or slime mold includes white rust and downy mildew. Both these cause disease in plants and other organisms.
Correct answer: Oomycota- A. Protozoan and Algae
- B. Protozoan and Fungi
- C. Protozoan and Viruses
- D. Fungi and Viruses
- E. Viruses and Bacteria
Explanation: "The explanation for this question will be added soon!".
Correct answer: Protozoan and Algae- A. Animal-like Protoctists
- B. Fungi-like Protoctists
- C. Plant-like Protoctists
- D. Bacteria-like Protoctists
- E. Virus-like Protoctists
Explanation: "The explanation for this question will be added soon!".
Correct answer: Plant-like Protoctists- A. Chlorophyll
- B. Melanin
- C. Carotenoids
- D. Xanthophylls
- E. Phycoerythrin
Explanation: "The explanation for this question will be added soon!".
Correct answer: Melanin- A. Not easily cultured
- B. Body is two-celled
- C. Contains single nucleus
- D. Mitochondria is absent
- E. Method of reproduction is by Endospore Formation
Explanation: "The explanation for this question will be added soon!".
Correct answer: Contains single nucleus