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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181. The protists have:
- A. Only free nucleic acid aggregates
- B. Membrane bound nucleoproteins lying embedded in the cytoplasm
- C. Gene containing nucleoproteins condensed together in loose mass
- D. Nucleoprotein in direct contact with the rest of the cell substance.
Explanation: Let's explain each option individually: a) Only free nucleic acid aggregates: This option is not correct.
Correct answer: Membrane bound nucleoproteins lying embedded in the cytoplasm- A. Bacteria
- B. Green algae
- C. Soil fungi mosses.
- D. Mosses
Explanation: Let's explain each option individually: a) Bacteria: This option is correct.
Correct answer: Bacteria- A. Plasmid vectors
- B. Phage vectors
- C. Cosmids
- D. F-factors
Explanation: Let's explain each option individually: a) Plasmid vectors: Plasmid vectors are small, circular DNA molecules that can be used to carry…
Correct answer: Phage vectors- A. Rhizobium
- B. Clostridium
- C. Azotobacter
- D. Klebsiella
Explanation: Let's explain each option individually: a) Rhizobium: Rhizobium is a genus of soil bacteria that are known for their ability to form a…
Correct answer: Azotobacter- A. Parasitism
- B. Symbiosis
- C. Antagonism
- D. Endemism
Explanation: Let's explain each option individually: a) Parasitism: Parasitism is a symbiotic relationship between two organisms where one organism…
Correct answer: Symbiosis- A. Erythrocytes
- B. Liver cells
- C. Erythrocytes and liver cells
- D. Erythrocytes, liver cells and spleen cells.
Explanation: Let's explain each option individually: a) Erythrocytes: The erythrocyte stage of Plasmodium occurs during the asexual reproduction phase…
Correct answer: Erythrocytes and liver cells- A. Leishmania
- B. Trypanosoma
- C. Ascaris
- D. Plasmodium
Explanation: The correct option is d) Plasmodium. Let's explain each option individually: a) Leishmania: Leishmania is a parasitic protozoan that…
Correct answer: Plasmodium- A. Histones and nonhistones
- B. RNA and histones
- C. A single double stranded DNA
- D. A single stranded DNA
Explanation: Let's explain each option individually: a) Histones and nonhistones: In eukaryotic cells, histones are proteins associated with DNA, and…
Correct answer: A single double stranded DNA- A. Easily cultured
- B. Easily available
- C. Easy to handle
- D. Easily multiplied in host
Explanation: Let's explain each option individually: a) Easily cultured: This option is correct. Escherichia coli (E.
Correct answer: Easily cultured- A. Neither syngamy nor reduction division
- B. Distinct chromosomes are absent
- C. No conjugation
- D. No exchange of genetic materia
Explanation: Let's explain each option individually: a) Neither syngamy nor reduction division: This option is correct.
Correct answer: Neither syngamy nor reduction division- A. Mosses
- B. Lichens
- C. Mushrooms
- D. Puffballs
Explanation: Let's explain each option individually: a) Mosses: Mosses are sensitive to air pollution, including sulfur dioxide (SO2) pollution, but…
Correct answer: Lichens- A. Pseudopodia
- B. Nucleus
- C. Contractile vacuole
- D. General surface
Explanation: In both Amoeba and Paramecium, osmoregulation occurs through a specialized organelle called the contractile vacuole.
Correct answer: Contractile vacuole- A. Plasmodium vivax transmitted by tsetse fly
- B. Trypanosoma lewsii transmitted by bed bug
- C. Trypanosoma gambiense transmitted by Glossina palpalis
- D. Entamoeba gingivalis spread by housefly
Explanation: Trypanosoma gambiense is one of the subspecies of Trypanosoma brucei that causes African sleeping sickness in West and Central Africa.
Correct answer: Trypanosoma gambiense transmitted by Glossina palpalis- A. Plasmodium falciparum
- B. P. vivax
- C. P. ovale
- D. P. malariae
Explanation: Malignant tertian malarial parasite is caused by Plasmodium falciparum.
Correct answer: Plasmodium falciparum- A. Sarcodina
- B. Ciliata
- C. Sporozoa
- D. Dinophyceae
Explanation: Plasmodium, the malarial parasite, belongs to class Sporozoa. This class is a group of parasitic protozoans that are characterized by…
Correct answer: Sporozoa- A. Eating balanced food
- B. Eating plenty of fruits
- C. Drinking boiled water
- D. Using mosquito nets
Explanation: Amoebiasis, also known as amebiasis, is a gastrointestinal infection caused by the protozoan parasite Entamoeba histolytica.
Correct answer: Drinking boiled water- A. Polymorphic
- B. Monogenetic
- C. Facultative parasite
- D. Nonpathogenic
Explanation: Trypanosoma is polymorphic. Polymorphism refers to the existence of different forms or morphological variations within a species.
Correct answer: Polymorphic- A. Micronucleus
- B. Macronucleus
- C. Both micronucleus and macronucleus
- D. Mitochondria
Explanation: Paramecium contains a single large macronucleus and one small micronucleus.
Correct answer: Micronucleus- A. Merozoite
- B. Sporozoite
- C. Trophozoite
- D. Minuta form
Explanation: Sporozoites are the form of Plasmodium that is transmitted to humans through the bite of an infected female Anopheles mosquito.
Correct answer: Sporozoite- A. Cell wall
- B. Cell membrane
- C. Cytoplasm
- D. Flagella
Explanation: Gram-positive bacteria have a thick layer of peptidoglycan in their cell wall, which retains the crystal violet stain used in the Gram…
Correct answer: Cell wall