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. Rickets
- B. Goiter
- C. Malaria
- D. Beri-beri
- E. Alzheimer's
Explanation: Malaria is a vector-borne infectious disease caused by Plasmodium parasites.
Correct answer: Malaria- A. Viruses
- B. Viroids
- C. Bacteria
- D. Fungus
Explanation: Binary fission is a type of asexual reproduction in which a single cell divides into two identical daughter cells.
Correct answer: Bacteria- A. Making coral reefs
- B. Forming limestone deposits
- C. Making fertilizers
- D. Forming chalk deposits
Explanation: The multicellular body form of red algae is commonly composed of complex interwoven filaments that are delicate and feathery.
Correct answer: Making fertilizers- A. They have flagella
- B. They are multicellular
- C. They do not cause any disease in humans
- D. They move by forming specialized cytoplasmic projections called pseudopodia
Explanation: Amoeba moves from one place to another using their cytoplasmic processes and by the process of pseudopodia.
Correct answer: They move by forming specialized cytoplasmic projections called pseudopodia- A. Protista
- B. Monera
- C. Metazoa
- D. Animal
- E. Bryophyta
Explanation: Kingdom protista has membrane bound organelles as shown in the diagram and a true nucleus. That is why, option A is correct.
Correct answer: Protista- A. Haploid
- B. Diploid
- C. Triploid
- D. Polyploidy
Explanation: Ulva cycles between two morphologically similar multicellular adult phases, a haploid gametophyte, and a diploid sporophyte.
Correct answer: Haploid- A. Sporozoite
- B. Merozoite
- C. Gametocyte
- D. Oocyte
Explanation: The fever and chills of malaria are associated with the rupture of erythrocytic-stage schizonts.
Correct answer: Merozoite- A. Trichonympha
- B. Trypanosoma
- C. Choanoflagellate
- D. Euglena
Explanation: Protozoa that move by means of flagella are called zooflagellates. Trypanosoma is a human parasitic flagellate.
Correct answer: Trypanosoma- A. Chlorophyll a and b
- B. Starch as stored food
- C. Cellulose cell wall
- D. Multicellular sex organs
Explanation: Chlorophyta is a phylum of green algae that live in marine habitats. Some of them are found in freshwater and on land.
Correct answer: Multicellular sex organs- A. Oral groove
- B. Contractile vacuole
- C. Vesicle
- D. Vacuole
Explanation: The organelle used to remove excess water in protozoa is a contractile vacuole.
Correct answer: Contractile vacuole- A. Amoeba
- B. Arthropods
- C. Foraminifera
- D. Zooflagellates
Explanation: Zooflagellates are mostly unicellular (a few are colonial) organisms with spherical or elongated bodies with a single central nucleus.
Correct answer: Zooflagellates- A. Members can be photosynthetic
- B. Members can be free living
- C. Some members move via flagella
- D. Some members are shaped like rods and termed bacilli
- E. Some members spend part of their life cycle inside insects
Explanation: Protists are a group of loosely connected, mostly unicellular eukaryotic organisms that are not plants, animals, or fungi.
Correct answer: Some members are shaped like rods and termed bacilli- A. Cell death
- B. Cell division
- C. Budding
- D. Recombination
Explanation: The process of sexual reproduction in paramecium is termed conjugation.
Correct answer: Cell division- A. Phytopthora
- B. Chlorella
- C. Ulva
- D. Euglena
Explanation: Ulva, also called sea lettuce, exists in two forms: 26 chromosomal state (sporophyte) and 13 chromosomal state (gametophyte).
Correct answer: Ulva- A. African sleeping sickness
- B. European sleeping sickness
- C. Indonesian sleeping sickness
- D. American sleeping sickness
Explanation: Parasitic flagellates cause diseases. For example Trypanosoma is a human parasite causing African sleeping sickness.
Correct answer: African sleeping sickness- A. Gastrozoid
- B. Sporozoite
- C. Plasmodium
- D. Merozote
Explanation: Usually, plasmodial slime molds exist as a plasmodium. It is a diploid multinucleated cytoplasmic mass enveloped by a slime sheath.
Correct answer: Plasmodium- A. Cellular slime molds
- B. Ciliates
- C. Dinoflagellates
- D. Euglenoids
- E. Apicomplexans
Explanation: Apicomplexans are the least motile since they lack specific structures to assist in their locomotion.
Correct answer: Apicomplexans- A. Making coral reefs
- B. Forming limestone deposits
- C. Making fertilizers
- D. Forming chalk deposits
Explanation: The multicellular body form of red algae is commonly composed of complex interwoven filaments that are delicate and feathery.
Correct answer: Making fertilizers- A. Amoeba
- B. Arthropods
- C. Foraminifera
- D. Zooflagellates
Explanation: Zooflagellates are mostly unicellular (a few are colonial) organisms with spherical or elongated bodies with a single central nucleus.
Correct answer: Zooflagellates- A. Upper oogonium and lower round antheridium
- B. Globule and nucule present on the same plant
- C. Upper antheridium and lower oogonium
- D. Globule is the female reproductive structure
Explanation: c) : All species of Chara reproduce sexually and show highly advanced oogamy.
Correct answer: Upper antheridium and lower oogonium