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. Primary mycelium
- B. Secondary mycelium
- C. Tertiary mycelium
- D. Quaternary mycelium
Explanation: The correct answer is secondary mycelium. This stage occurs after the primary mycelium has established itself and involves the fusion of…
Correct answer: Secondary mycelium- A. 50%
- B. 40%
- C. 20%
- D. 30%
Explanation: Ascomycota, also known as sac fungi, are known for their ability to form symbiotic associations, particularly in the form of lichens.
Correct answer: 40%- A. They are most important source of antibiotics
- B. They have no known sexual stage.
- C. Hyphae fuse to give rise to dikaryotic mycelium
- D. The vast majority of spores are formed asexually
Explanation: Basidiomycota are fungi composed of hyphae, which gives rise to dikaryotic mycelium
Correct answer: Hyphae fuse to give rise to dikaryotic mycelium- A. Grapes
- B. Mango
- C. Oats
- D. Willow
Explanation: In inflorescence: Indeterminate inflorescence. A panicle is a branched raceme in which each branch has more than one flower, as in the…
Correct answer: Oats- A. Nostoc
- B. Volvox
- C. Spirogyra
- D. Ulva
Explanation: Ulva: This is a small genus of marine and brackish water green algae. It is edible and is often called 'Sea Lettuce'.
Correct answer: Ulva- A. Cactus
- B. Amaryllis
- C. Spurge
- D. Firs
Explanation: Answer; A (It should be D instead. Although for A both angiosperm and gymnosperm is coming on different websites, since D is certainly…
Correct answer: Cactus- A. glumes
- B. lemma & palea
- C. lodicules
- D. rochilla
Explanation: In the family Gramineae (Poaceae), the flower structure includes unique components like lodicules, which are small scales located below…
Correct answer: lodicules- A. Achieving haploidy
- B. Promoting survival
- C. Producing diploidy
- D. Having no significance
Explanation: The concept of alternation of generations in plants involves a life cycle that alternates between a diploid sporophyte stage and a haploid…
Correct answer: Promoting survival- A. Capsicum annuum
- B. Solanum tuberosum
- C. Medicago denticulata
- D. Bauhinia variegata
Explanation: The correct answer is Capsicum annuum. It is classified as a fruit because it develops from the ovary of a flower and contains seeds.
Correct answer: Capsicum annuum- A. Tracheophyta
- B. Bryophyte
- C. Thallophyta
- D. Embryophyta
Explanation: Class filicinae comes under vascular plants or tracheophyta.
Correct answer: Tracheophyta- A. Dry
- B. Wet
- C. Warm
- D. Covered
Explanation: Bryophytes have wet sterile hairs in between the sex organs to keep them protected from drying condition and for protection of…
Correct answer: Wet- A. Prothallus
- B. Saprophyte
- C. Micro gametophyte
- D. Mega gametophyte
Explanation: When a pollen grain germinates, it develops into a micro gametophyte, which carries the male gametes (sperm cells) for fertilization.
Correct answer: Micro gametophyte- A. Funaria
- B. Polytrichum
- C. Sphagnum
- D. Club mosses
Explanation: Club mosses, also known as Lycopodiopsida or Lycophytes, are a distinct group of plants that are not classified as mosses.
Correct answer: Club mosses- A. Fabaceae
- B. Solanaceae
- C. Poaceae
- D. Mimosaceae
Explanation: The correct answer is Poaceae. Wheat, maize, and rice belong to the Poaceae family, commonly known as the grass family, due to their…
Correct answer: Poaceae- A. Psilopsida
- B. Sphenopsida
- C. Pteropsida
- D. Lycopsida
Explanation: Among the options given, the pioneer group to develop true roots and true leaves is Pteropsida.Pteropsida: This group includes ferns…
Correct answer: Pteropsida- A. Sphenopslda
- B. Psilopsida
- C. Pteropsida
- D. Lycopsida
Explanation: Equisetum, commonly known as horsetail, is a genus of vascular plants that is a living member of the division Sphenopsida.
Correct answer: Sphenopslda- A. Rose
- B. Potato
- C. Apple
- D. Pea
Explanation: Peas have zygomorphic flowers with bilateral symmetry, as it does not possess actinomorphic flowers.
Correct answer: Pea- A. Liver wort
- B. Equisetum
- C. Funaria
- D. Polytrichum
Explanation: Equisetum, also known as horsetails, are not gametophyte plants. They have a dominant sporophyte stage in their life cycle.
Correct answer: Equisetum3059. Monotropa is a
- A. Total parasite
- B. Total saprophyte
- C. Partial parasite
- D. Partial saprophyte
Explanation: Monotropa is a total saprophyte. It obtains its nutrients entirely from decaying organic matter in the soil, and it does not perform…
Correct answer: Total saprophyte- A. Pollen grains
- B. Stamens
- C. Pollen sacs
- D. Female cone
Explanation: Pollen sacs, also known as microsporangia, are structures found within the anthers of stamens.
Correct answer: Pollen sacs