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. Filicinae
- B. Angiospermae
- C. Gymnospermae
- D. All of these options
Explanation: Refer to FTB, Ferns belong to the group Pteropsida, subgroup or class filicinae which are the most abundant group of seedless vascular…
Correct answer: Filicinae- A. Cocci
- B. Bacilli
- C. Spirilla
- D. None of these
Explanation: Spirilla bacteria are also termed curve screw shaped.
Correct answer: Spirilla- A. Polysaccharides
- B. Cellulose
- C. Amino Acids
- D. Proteins
Explanation: A bacteria consists of glycocalyx- the outermost covering of a bacteria, that exists in two forms i.e., capsule and slime.
Correct answer: Polysaccharides- A. Mesosomes
- B. Zygospores
- C. Endospores
- D. Cysts
Explanation: Endospores are dormant bodies that are capable of surviving for longer periods and are resistant to higher temperatures and UV radiations.
Correct answer: Endospores- A. Gram positive bacteria
- B. Gram negative bacteria
- C. Both Gram positive & negative
- D. None of these
Explanation: In Gram-negative bacteria, periplasmic space - the space between the peptidoglycan layer of the cell wall and cell membrane which is the…
Correct answer: Gram negative bacteria- A. Polysaccharides
- B. Proteins
- C. Peptidoglycan
- D. Cholesterol
Explanation: Bacterial cell walls are primarily composed of peptidoglycan, which is a unique macromolecule consisting of both sugars (polysaccharides)…
Correct answer: Peptidoglycan- A. Granules
- B. Cysts
- C. Spores
- D. Plasmids
Explanation: Spores are thick, dormant, and tough structures produced by some bacteria that provide resistance or protection against harsh or adverse…
Correct answer: Spores- A. Mycoplasma
- B. Streplococcus
- C. Escherichia
- D. Bacillus
Explanation: These bacteria lack a cell wall and are among the tiniest free-living organisms.
Correct answer: Mycoplasma- A. Spirochete
- B. Ecoli
- C. Pseudomonas
- D. Campylobacter
Explanation: Option A: Spirochetes are a diverse group of bacteria that exhibit a helical or spiral shape.
Correct answer: Campylobacter- A. Antonie Van Leeuwenhoek
- B. Robert Koch
- C. Louis Pasteur
- D. Twort
Explanation: Option A is the right answer. Leeuwenhoek first discovered microbes and called them animalcules.
Correct answer: Antonie Van Leeuwenhoek- A. Louis Pasteur
- B. Robert Koch
- C. Christain Gram
- D. None of above
Explanation: Germ Theory states that microorganisms known as pathogens or "germs" can lead to disease.
Correct answer: Robert Koch- A. Diplococcus
- B. Peritrichous
- C. Monotrichous
- D. A tetrad
Explanation: Bacteria can be classified according to the number of flagella on their cell wall, and peritrichous is a type will many flagella all over…
Correct answer: Peritrichous- A. Gram-negative bacteria are more likely to cause systemic effects because they lack an outer membrane which means they can infect host cells more quickly.
- B. Gram-negative bacteria are more likely to cause systemic effects because they have an outer membrane which is supposed to protect them from antibiotics
- C. Both Options A and B are correct
- D. None of these options is correct
Explanation: d) None of these options is correct.This option is the most accurate. Both Option A and Option B have inaccuracies in their statements.
Correct answer: None of these options is correct- A. Cube of eight cocci
- B. Square of four cocci
- C. Irregular structure
- D. Triangular 6 cocci
Explanation: Option A is correct since Sarcina is a cube of 8 cocci.
Correct answer: Cube of eight cocci- A. Gram-positive
- B. Gram-negative
- C. Both A and B
- D. None of these
Explanation: Correct option: A (fact) (Gram positive bacteria retain bluish purple dye when being tested).
Correct answer: Gram-positive- A. Tuberculosis and thyphoid
- B. Tuberculosis and measles
- C. Tuberculosis and cholera
- D. All of the above
Explanation: German physician Robert Koch was one of the founders of bacteriology. He discovered the anthrax disease cycle (1876) and the bacteria…
Correct answer: Tuberculosis and cholera- A. Robert Koch
- B. Louis Pasteur
- C. Alexander Fleming
- D. Leeuwenhoek
Explanation: Robert Koch was a German scientist who discovered the causative agents for deadly diseases like tuberculosis, cholera, and anthrax.
Correct answer: Robert Koch- A. Oral groove
- B. Contractive vacuole
- C. Vesicle
- D. Vacuole
Explanation: Freshwater protozoans or Protoctista pump excess water out of their body with the help of contractile vacuole because they do not have an…
Correct answer: Contractive vacuole- A. Vinegar
- B. Saliva
- C. Rainwater
- D. All of these options are correct
Explanation: Small creatures were first seen by Antony Leeuwenhoek, he called these creatures animalcules.
Correct answer: Rainwater- A. Osteichthyes
- B. Cyclostomata
- C. Chondrichthyes
- D. None of these
Explanation: Cyclostomi, often referred to as Cyclostomata, is a group of vertebrates that comprises the living jawless fishes: the lampreys and…
Correct answer: Cyclostomata