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. Ascomycota
- B. Zygomycota
- C. Basidiomycota
- D. Deuteromycota
Explanation: The correct answer is Option B:Zygomycota.Zygomycota are characterized by having non-septate (coenocytic), multinucleated hyphae and…
Correct answer: Zygomycota1682. Select the mismatched.
- A. Cycas-Dioecious
- B. Salvinia-Heterosporous
- C. Equisetum-Homosporous
- D. Pinus-dioecious
Explanation: Pinus, commonly known as pine trees, is monoecious. Pine is a conifer. Conifers are unisexual, which means male and female reproductive…
Correct answer: Pinus-dioecious- A. Diplontic, Haplodiplontic
- B. Haplodiplontic, Diplontic
- C. Haplodiplontic, Haplontic
- D. Haplontic, Diplontic
Explanation: (b) : Ectocarpus possesses haplodiplontic whereas Fucus possesses diplontic life cycle.
Correct answer: Haplodiplontic, Diplontic- A. Broad hardy leaves
- B. Superficial stomata
- C. Thick cuticle
- D. Presence of vessels
Explanation: (c) : Needle like leaves with thick cuticle and sunken stomata are xerophytic adaptations of conifers for tolerating extreme environmental…
Correct answer: Thick cuticle- A. Sequoia is one of the tallest trees
- B. The leaves of gymnosperms are not well adapted to extremes of climate
- C. Gymnosperms are both homosporous and heterosporous
- D. Salvinia, Ginkgo, and Pinus all are gymnosperms
Explanation: (a) : Sequoia sempervirens is the tallest gymnosperm. The leaves of gymnosperms are well adapted to extremes of climate.
Correct answer: Sequoia is one of the tallest trees- A. Birds
- B. Water
- C. Wind
- D. Insects
Explanation: (b) : The sperms of bryophytes and pteridophytes are flagellated and hence require an external supply of water to reach archaegonia
Correct answer: Water- A. Pteris
- B. Pinus
- C. Funaria
- D. Marchantia
Explanation: (b) : In gymnosperms (like Pinus), the male and female gametophyte do not have an independent free living existence.
Correct answer: Pinus- A. A, D, and E
- B. B, C, and E
- C. A, C, and D
- D. B, C, and D
Explanation: (a) : Selaginella is a heterosporous pteridophyte. Corralloid roots of Cycas harbour blue green algae like Nostoc, Anabaena and are not a…
Correct answer: A, C, and D- A. Ectocarpus
- B. Spirogyra
- C. Polysiphonia
- D. Anabaena
Explanation: (a) : Ectocarpus produces biflagellate gametes. Anabaena is a cyanobacteria and does not reproduce sexually.
Correct answer: Ectocarpus- 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- A. Marchantia
- B. Riccia
- C. Funaria
- D. Sphagnum
Explanation: (d) : Among the bryophytes Sphagnum accounts by far the most important place economically. It is popularly called bog moss or peat moss.
Correct answer: Sphagnum- A. Pteris
- B. Funaria
- C. Lilium
- D. Pinus
Explanation: Lilium is an angiosperm plant, in which male gametophyte is 3 - celled and most reduced gametophyte as compared to Funaria (bryophyte).
Correct answer: Lilium- A. Volvox
- B. Fucus
- C. Chlamydomonas
- D. Spirogyra
Explanation: (d) : Chlamydomonas hasflagellated gametes which are similar or dissimilar in size.
Correct answer: Spirogyra- A. Upper antheridium and lower oogonium on the same plant
- B. Upper oogonium and lower antheridium on the same plant
- C. Antheridiophore and archegoniophore on the same plant
- D. Stamen and carpel on the same plant
Explanation: (B) : All species of Chara reproduce sexually and show highly advanced oogamy.
Correct answer: Upper antheridium and lower oogonium on the same plant- A. Mosses
- B. Algae
- C. Ferns
- D. Fungi
Explanation: (b) : Syngamy is the complete and permanent fusion of male and female gametes to form the zygote.
Correct answer: Algae- A. Presence of archegonia
- B. Well developed vascular tissues
- C. Independent gametophyte
- D. Independent sporophyte
Explanation: (a ) : In Funaria ( Bryophyta), Dryopteris is (Pteridophyta) and Ginkgo (Gymnosperm) female sex organ ar archegonium is formed.
Correct answer: Well developed vascular tissues- A. Sphagnum
- B. Salvinia
- C. Marchantia
- D. Funaria
Explanation: (c) : Sphagnum and Funaria belong to Class Bryopsida of Division Bryophyta. They are typically mosses.
Correct answer: Marchantia- A. Pteridophyte gametophyte has a protonemal and leafy stage
- B. In gymnosperms, female gametophyte is freeliving
- C. Antheridiophores and archegoniophores are present in pteridophytes
- D. Origin of seed habit can be traced in pteridophytes
Explanation: (d) : In the majority of the pteridophytes all the spores are of similar kinds ; such plants a recalled homosporous.
Correct answer: Origin of seed habit can be traced in pteridophytes- A. Seeds
- B. Motile sperms
- C. Cambium
- D. Vessels
Explanation: (b) : Cycas is a gymnosperm and Adiantum is a pteridophyte. Cambium and seeds are absent in pteridophytes, while vessels are absent in…
Correct answer: Motile sperms- A. Two
- B. Three
- C. Four
- D. One
Explanation: (d ) : Equisetum is a pteridophyte and in pteridophytes, the main plant body is sporophyte which is differentiated into true root, stem…
Correct answer: Three