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. Halophytes
- B. Psammophytes
- C. Hydrophytes
- D. Mesophytes
Explanation: The presence of pneumatophores, i.e., small negatively geotropic vertical roots and vivipary or seed germination while attached to a plant…
Correct answer: Halophytes- A. Same types of spores
- B. Multicellular embryo
- C. Dominant sporophyte
- D. Rhizoids to absorb water
Explanation: Bryophytes have same spores, multicellular embryo and rhizoids. Bryophytes have a dominant gametophyte stage, not a sporophyte stage, that…
Correct answer: Dominant sporophyte- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: In the life cycle of ferns, the prothallus is the gametophyte stage, which is small and heart-shaped.
Correct answer: Option A- A. Has bushy appearance
- B. Has sporangia on sporangiophores
- C. Has large number of joints in stem
- D. Stores granules of silica within the cells
Explanation: The term 'arthrophytes' is used to describe plants in the Sphenopsida class due to their distinctive jointed stems.
Correct answer: Has large number of joints in stem- A. Haploid, Haploid, Haploid
- B. Haploid, Haploid, Diploid
- C. Diploid, Diploid, Diploid
- D. Diploid, Diploid, Haploid
Explanation: In angiosperms, the female gametophyte is called the embryo sac. It typically consists of seven cells: three antipodal cells, two…
Correct answer: Haploid, Haploid, Diploid- A. Rosaceae
- B. Fabaceae
- C. Solanaceae
- D. Mimosaceae
Explanation: The Solanaceae family, also known as the nightshade family, encompasses a variety of economically significant crops, including potatoes…
Correct answer: Solanaceae- A. Independent and dominant, less conspicuous and dependent
- B. Less conspicuous and dependent, independent and dominant
- C. Dependent and dominant, more conspicuous and independent
- D. More conspicuous and independent, dependent and dominant
Explanation: In gymnosperms, the life cycle includes two distinct generations: the sporophyte and the gametophyte.
Correct answer: Independent and dominant, less conspicuous and dependent- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: In Marchantia, the gametophyte is the dominant phase of the life cycle, exhibiting structures known as antheridiophores and…
Correct answer: Option D- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: In a floral diagram representing an epipetalous androecium, the stamens (androecium) are attached to the petals (corolla).
Correct answer: Option A- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The correct answer is D: (Sporangium). In the life cycle of a moss plant, meiosis occurs in the sporangium.
Correct answer: Option D- A. Protect the female gametes
- B. Produce the female gametes
- C. Secrete enzymes for seed
- D. Provide nutrition to the developing embryo
Explanation: The correct answer is:Provide nutrition to the developing embryo.The endosperm is a tissue produced inside the seeds of most flowering…
Correct answer: Provide nutrition to the developing embryo- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The correct option is C (Wheat leaf), as wheat is an example of a monocot plant. Monocots typically have leaves with parallel venation.
Correct answer: Option C- A. Helps in seed formation
- B. Ensures the development of motile sperms
- C. Provides an efficient way of spore dispersion
- D. Helps in the production of independent gametophytes
Explanation: The correct answer is option D. Heterospory helps in the production of independent gametophytes.
Correct answer: Helps in the production of independent gametophytes- A. Provide protection
- B. Provide nourishment
- C. Help in gametes production
- D. Help in vegetative propagation
Explanation: The primary function of structure X is vegetative propagation.A gemma cup is a cup-shaped structure found on the surface of bryophytes…
Correct answer: Help in vegetative propagation- A. I only
- B. II only
- C. I and II
- D. II and III
Explanation: A polypetalous flower is one where the petals are separate and distinct from each other, meaning they are not fused together.
Correct answer: II and III- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: C is the correct floral formula for the plant given.This formula indicates the flower is zygomorphic (bilaterally symmetrical), bisexual…
Correct answer: Option C- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The correct answer is Option A.Student A's floral diagram accurately represents the given flower's structure, showcasing the correct…
Correct answer: Option A- A. Parallel venation in leaves
- B. Taproot system
- C. Two cotyledons
- D. Vascular bundles in a ring arrangement
Explanation: The correct answer is Option A: Parallel venation in leaves.Monocot plants are characterized by having leaves with parallel venation.
Correct answer: Parallel venation in leaves- A. Psilopsida
- B. Lycopsida
- C. Pteropsida
- D. Sphenopsida
Explanation: The correct answer is Lycopsida.This group, also known as club mosses, is recognized as the first to develop true leaves and roots, a…
Correct answer: Lycopsida- A. Leaves and Seta
- B. Seta and Capsule
- C. Shoots and Leaves
- D. Rhizoids and Capsule
Explanation: Leaves, stems, shoots rhizoids and reproductive organs are part of gametophyteso C is correct.
Correct answer: Shoots and Leaves