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. Possess archegonia
- B. Contain chloroplast
- C. Are thalloid forms
- D. Have no conducting tissue
Explanation: Bryophytes, such as mosses and liverworts, possess specialized structures called archegonia, which are involved in the fertilization…
Correct answer: Possess archegonia- A. Some bryophytes
- B. Pteridophytes
- C. All bryophytes
- D. Gymnosperms
Explanation: Multicellular branched rhizoids and leafy gametophytes are characteristics of some bryophytes.
Correct answer: Some bryophytes- A. 640
- B. 300
- C. 1000
- D. 900
Explanation: (d) : Gymnosperms originated about 200 million years ago and were dominant species at that time.
Correct answer: 900- A. Fucoxanthin
- B. Haematochrome
- C. Phycocyanin
- D. Phycoerythrin
Explanation: a. Brown algae are the members of the Class Phaeophyceae. Their chromatopores are ellipsoidal or discoid.
Correct answer: Fucoxanthin- A. Pteridophyta
- B. Thallophyta
- C. Tracheophyta
- D. Bryophyta
Explanation: d. Bryophyta is indeed referred to as the "amphibians" of the plant kingdom because they are often found in damp or aquatic environments…
Correct answer: Bryophyta- A. 12
- B. 8
- C. 16
- D. 24
Explanation: In gymnosperms, the endosperm is typically haploid, and its chromosome number is reduced.
Correct answer: 8- A. Completely sporophyte
- B. Predominantly gametophyte with sporophyte
- C. Completely gametophyte
- D. Predominantly sporophyte with gametophyte
Explanation: b. Funaria is known as common moss or green moss. The plant body is foliose that consists of stem axis which bears many leaves and instead…
Correct answer: Predominantly gametophyte with sporophyte1748. A well-developed archegonium with neck consisting of 46 rows and neck canal cells characterises
- A. Gymnosperms and flowering plants
- B. Pteridophytes and gymnosperms
- C. Gymnosperms only
- D. Bryophytes and pteridophytes.
Explanation: (d) : Bryophytes and pteridophytes both have alternation of generation.
Correct answer: Bryophytes and pteridophytes.- A. Selaginella
- B. Funaria
- C. Chlamydomonas
- D. Pinus
Explanation: From an evolutionary viewpoint, Pinus is considered the most advanced among the options provided.
Correct answer: Pinus- A. Vascular tissues
- B. Motile antherozoids
- C. Archegonia
- D. Alternation of generations
Explanation: a. Vascular Tissues: Pteridophytes are the first group of land plants that possess well-developed vascular tissues, including xylem and…
Correct answer: Vascular tissues- A. Independent gametophyte
- B. Well developed vascular system
- C. Archegonia
- D. Flagellate spermatozoids
Explanation: Pteridophytes differ from mosses/bryophytes in possessing: Well developed vascular system The most significant difference between…
Correct answer: Well developed vascular system- A. 12
- B. 18
- C. 6
- D. 24
Explanation: ( c) : In Pinus, if the pollen grain has 6 chromosomes then its endosperm will also have 6 chromosomes as endosperm and pollen grains are…
Correct answer: 6- A. Pteridophytes
- B. Mosses
- C. Ferns
- D. Gymnosperms
Explanation: A plant having seeds but lacking flowers and fruits belongs to Gymnosperms.Gymnosperms are a group of seed plants that produce naked…
Correct answer: Gymnosperms- A. Archegonium
- B. Embryo
- C. Flagellate sperms
- D. Roots
Explanation: Funaria is a moss, while Selaginella is a pteridophyte. Both mosses and pteridophytes have archegonia, embryos, and flagellate sperms.
Correct answer: Roots- A. Pteridophyta
- B. Rhodophyta
- C. Bryophyta
- D. Phaeophyta
Explanation: The plant group that produces spores and embryos but lacks vascular tissues and seeds is Bryophyta.
Correct answer: Bryophyta- A. Pinus
- B. Selaginella
- C. Chlamydomonas
- D. Dryopteris
Explanation: Option 1: Pinus Pinus is a gymnosperm, which means that it produces naked seeds.
Correct answer: Chlamydomonas- A. They require a layer of water for carrying out sexual reproduction
- B. They occur in damp places
- C. They are mostly aquatic
- D. All the above
Explanation: (a) : Bryophytes are called amphibians of plant kingdom because they complete their vegetative phase on land but water is necessary for…
Correct answer: They require a layer of water for carrying out sexual reproduction- A. Isogamous
- B. Anisogamous
- C. Oogamous
- D. Hologamous
Explanation: Isogamy is a type of sexual reproduction in which the gametes are identical in size, shape, and structure.Oogamy is a type of sexual…
Correct answer: Isogamous- A. Zygospore
- B. Zoospore
- C. Oospore
- D. Carpospore
Explanation: The product of conjugation in Spirogyra or fertilization of Chlamydomonas is a zygospore.A zygospore is a thick-walled resting spore that…
Correct answer: Zygospore- A. Spore dispersal
- B. Photosynthesis
- C. Protection
- D. Absorption
Explanation: The moss peristome takes part in spore dispersal. The peristome is a ring of teeth that surrounds the opening of the moss capsule.
Correct answer: Spore dispersal