Free Biodiversity and Variety of Life MCQs with Answers

• A. Yeast
• B. Trichonympha
• C. Paramecium
• D. Euglena

Explanation: Answer is "Euglena"Explanation: Euglenoids have at various times been classified in the plant kingdom (with algae) and in animal kingdom…

• A. Malaria
• B. Diabetes mellitus
• C. HIV/AIDS
• D. Typhoid fever.

Explanation: Widal test (developed by G.F.I Widal) is an agglutination test for the presence of antibodies against the Salmonella organism that causes…

• A. Plasmodium
• B. Trypanosoma
• C. Anopheles
• D. Insects

Explanation: Explanation:Tse-tse fly causes the sleeping sickness and skin diseases by transmitting Trypanosoma.

• A. Ulothrix
• B. Chlorella
• C. Spirogyra
• D. Polysiphonia

Explanation: Protein-rich alga Chlorella is a "superfood" supplement for humans.

• A. Entamoeba
• B. Paramecium
• C. Plasmodium
• D. Trypanosoma

Explanation: Apicomplexa is a large class of parasitic protozoans, many of which are pathogenic to humans and animals.

• A. have cell walls
• B. reproduce asexually
• C. develop from an embryo
• D. possess membrane bounded organelles

Explanation: Protists are a diverse group of eukaryotic microorganisms that are not classified as plants, animals, or fungi.

• A. Cholera
• B. Malaria
• C. Dysentery
• D. Sleeping sickness

Explanation: Apicomplexa is a class of protozoan parasites known to cause several diseases in humans and animals.

• A. Diatoms
• B. Actinopods
• C. Foraminiferans
• D. Dinoflagellates

Explanation: The correct answer is diatoms. Diatoms are a group of photosynthetic protists known for their unique silica shells, which are composed of…

• A. Is heterotrophic
• B. Possesses two nuclei
• C. Use flagella for locomotion
• D. Is unicellular and eukaryotic

Explanation: Both Euglena and Paramecium are single-celled, eukaryotic organisms, but they differ in how they move and obtain energy.

• A. Entangle the prey
• B. Enhance water beauty
• C. Form limestone deposits
• D. Exchange genetic material

Explanation: The correct answer is that the cytoplasmic projections help foraminiferans to entangle the prey.

• A. A common moneran ancestor
• B. More than one moneran ancestor
• C. The heritable genetic changes in viruses
• D. The organic substances of the environment

Explanation: Protists are polyphyletic because they arose from multiple independent evolutionary lines among the first eukaryotes, meaning they trace…

• A. Fucus and Ulva
• B. Ulva and Spirogyra
• C. Polysiphonia and Fucus
• D. Polysiphonia and Spirogyra

Explanation: The protist group closely related to land plants is green algae, including Ulva and Spirogyra. So option B is correct.

• A. Diatoms and Dinoflagellates
• B. Green algae and Zooflagellates
• C. Foraminiferans and Euglenoids
• D. Brown algae and Water molds

Explanation: The correct answer is Option A:diatoms and dinoflagellatesThese groups of protists are primary producers in aquatic ecosystems…

• A. The walls of diatoms are easily destructible.
• B. 'Diatomaceous earth' is formed by the cell walls of diatoms.
• C. Diatoms are chief producers in the"Diatoms are chief producers in the oceans."
• D. Diatoms are microscopic and float passively in water.

Explanation: The wrong statement is: "Diatoms are chief producers in the oceans."Explanation of the options:1.

• A. The term 'contagium vivum fluidum' was coined by M. W. Beijerinck.
• B. Mosaic disease in tobacco and AIDS in human being are caused by viruses.
• C. The viroids were discovered by D.J.Ivanowsky.
• D. W.M.Stanley showed that viruses could be crystallised.

Explanation: The wrong statement is: "Mosaic disease in tobacco and AIDS in human beings are caused by viruses."Explanation of each statement:1.

• A. Mycoplasma
• B. Nostoc
• C. Aspergillus
• D. Funaria

Explanation: Mycoplasma (KingdomMonera) are the simplest and smallest free living prokaryotes which are devoid of a cell wall.

• A. All are parasites.
• B. All of them have helical symmetry.
• C. They don't have ability to synthesize nucleic acids and proteins.
• D. Antibiotics have no effect on them.

Explanation: "All are parasites": This statement is correct. Viruses are obligate intracellular parasites, meaning they depend on a host cell to…

• A. Prokaryotic organisms
• B. Fungi
• C. All unicellular organisms
• D. Eukaryotic organisms

Explanation: The kingdom Protoctista (also known as Protista) includes a diverse group of eukaryotic microorganisms.

• A. Type of nucleic acids
• B. Protein subunits
• C. Type of hosts
• D. Viral envelope

Explanation: The shape of the virus is determined by the shape of its capsid which is determined by its protein subunits.

• A. Uncoating
• B. Reverse Transcription
• C. Provirus
• D. Assembly

Explanation: "The explanation for this question will be added soon!"