Free Biodiversity and Variety of Life MCQs with Answers

• A. Zygote undergoes meiosis
• B. Zygote develops into gametophyte
• C. Sporophyte generation produces haploid spores
• D. Gametophyte generation produces diploid gametes

Explanation: Alternation of generations is a life cycle in plants, algae, and some fungi where a multicellular haploid gametophyte stage alternates…

• A. Psilotum
• B. Lycopodium
• C. Both Psilotum and Lycopodium
• D. None of the given options

Explanation: Psilotum belongs to Psilopsida. Psilotum belongs to Psilopsida. Psilotum is a genus of fern-like vascular plants.

• A. Spores
• B. Capsule
• C. Gametophyte
• D. None of these

Explanation: The visible part of angiosperms is the sporophyte, but none of the given options fit.

• A. Glumes
• B. Lemma and palea
• C. Lodicule
• D. Rochella

Explanation: In the family Gramineae, which is now commonly referred to as Poaceae, the reproductive structure is not a typical flower with petals…

• A. Ginkgo
• B. Marchantia
• C. Cedrus
• D. Equisetum

Explanation: (d) : Pteridophytes are known as vascular cryptogams (Gk Kryptos = hidden + gamos= wedded).

• A. Porphyra
• B. Fucus
• C. Gracillaria
• D. Chara

Explanation: (b) : Fucus is a brown algae i.e. belongs to Class Phaeophyta. In this alga the accumulation product of photosynthesis is D­mannitol (a…

• A. There is high degree of sterility
• B. One can conclude that the plant is apomictic
• C. Self fertilization is prevented
• D. There is no change in success rate of fertilization.

Explanation: (c) : In the prothallus of vascular cryptogams the antherozoids and eggs mature at different times.

• A. It serves as a disinfectant
• B. It is easily available
• C. It is hygroscopic
• D. It reduces transpiration

Explanation: (c) : The partially decomposed Sphagnum mass accumulates to form a compressed mass called peat, which after drying is used as coal.

• A. Osmunda and Equisetum
• B. Marsilea and Botrychium
• C. Adiantum and Cucurbitaceae
• D. Dicksonia and Maiden hair fern.

Explanation: a. Osmunda includes various species of ferns, such as the royal fern, which exhibit an ectophloic siphonostele.

• A. Cycads
• B. Conifers
• C. Polypetalous angiosperms
• D. Gamopetalous angiosperms

Explanation: a. Cycas is an evergreen palm-like plant. The plant body is sporophytic differentiated into root, stem, and leaves, sexual reproduction is…

• A. Heterogametes
• B. Basidiospores
• C. Isogametes
• D. Anisogametes

Explanation: c. Ulothrix filaments produce isogametes. Isogametes are gametes that are of similar size and morphology, and they can fuse to form a…

• A. Ovuliferous scale
• B. Integument
• C. Nucellus
• D. Bract

Explanation: In Pinus (pine), the wings of the seed develop from the ovuliferous scale.

• A. Tree habit
• B. Green leaves
• C. Ovules not nclosed in ovary
• D. Wood

Explanation: a.Tree Habit: Both Pinus and mango are trees, so this is a common feature, and they share the tree habit. b.

• A. Riccia
• B. Funaria
• C. Anthoceros
• D. Spirogya

Explanation: Protonema occurs in the life cycle of Funaria.The protonema is a juvenile stage of the gametophyte in the life cycle of mosses.

• A. Cycas
• B. Pinus
• C. Cedrus
• D. Abies

Explanation: Cycas: Cycas is a genus of gymnosperms that are native to tropical and subtropical regions of the world.

• A. Angiospermous wood
• B. Bryophytes
• C. Gymnospermous wood
• D. Ferns

Explanation: Gymnosperms are a group of seed plants that includes conifers, such as pines and firs.

• A. Cycas
• B. Angiosperm
• C. Selaginella
• D. Moss

Explanation: Mosses have the largest gametophytes. The gametophyte is the dominant generation in mosses, meaning that it is the larger and more…

• A. Gynoecium
• B. Androecium
• C. Corolla
• D. Calyx

Explanation: The term "polyadelphous" is related to the androecium, which is the male reproductive organ of a flower.

• A. Three
• B. Four
• C. Five
• D. Six

Explanation: (d) : The correct answer is six.A superior ovary is an ovary that is located above the other floral parts, such as the sepals, petals, and…

• A. Zygomorphic, hypogynous with imbricate aestivation
• B. Zygomorphic, epigynous with twisted aestivation
• C. Actinomorphic, hypogynous with twisted aestivation
• D. Actinomorphic, epigynous with valvate aestivation

Explanation: (c) : In China rose the flowers are actinomorphic i.e., it can be divided into two equal radial halves in any radial plane passing through…