Free Biodiversity and Variety of Life MCQs with Answers

• A. Smaller but to have larger sex organs
• B. Larger but to have smaller sex organs
• C. Larger and to have larger sex organs
• D. Smaller and to have smaller sex organs

Explanation: (d) : In bryophytes, the dominant phase of the life cycle is the gametophytic plant body.

• A. Polytrichum
• B. Adiantum
• C. Marchantia
• D. Pinus

Explanation: (d) : In gymnosperms (like Pinus), the male and female gametophyte do not have an independent free living existence.

• A. Marchantia
• B. Chara
• C. Adiantum
• D. Funaria

Explanation: (a) : Marchantia is a dioecious plant. Male plants bear antheridiophores and female plants bear archegoniophores.

• A. Alnus
• B. Cycas
• C. Cicer
• D. Pisum

Explanation: (b) : Cycas forms facultative symbiotic association with autotrophic nitrogen fixing cyanobacteria.

• A. Archegoniophore, Femalethallus, Gemmacup, Rhizoids
• B. Archegoniophore, Female, thallus, Bud Foot
• C. Seta, Sporophyte, Protonema, Rhizoids
• D. Antheridiophore, Malethallus, Globule, Roots

Explanation: (a) : The given figure is of female thallus of Marchantia (bryophyte) in which A,B, C and D are archegoniophore, female thallus, gemma cup…

• A. A and C
• B. A and D
• C. B and C
• D. A and B

Explanation: (b) : The sporophyte in mosses is more elaborate than that in liverworts.

• A. The sporophyte in liverworts is more elaborate than that in mosses.
• B. Salvinia is heterosporous
• C. The life­cycle in all seed­bearing plants is diplontic
• D. In Pinus male and female cones are born on different trees.

Explanation: (b) : The sporophyte in mosses is more elaborate than that in liverworts.

• A. Cellulose, galactans, and mannans
• B. Hemicellulose, pectins, and proteins
• C. Pectins, cellulose, and proteins
• D. Cellulose, hemicellulose, and pectins

Explanation: Algae are photosynthetic organisms that belong to the kingdom Protista.

• A. Mustard
• B. Castor
• C. Pinus
• D. Sphagnum

Explanation: (d) : Sphagnum is a bryophyte in which dominant phase or plant body is independent and free living gametophyte.

• A. Marchantia
• B. Cycas
• C. Pinus
• D. Date palm

Explanation: (c) : Monoecious plants have separate male and female flowers on the same plant.

• A. Heterospory
• B. Haplontic life cycle
• C. Free­living gametophyte
• D. Dependent sporophyte

Explanation: The sporophyte generation in plants is the diploid phase that produces spores through meiosis.

• A. Pinus
• B. Cycas
• C. Papaya
• D. Marchantia

Explanation: A): Monoecious plants have separate male and female flowers on the same plant.

• A. Perianth and two integuments
• B. Embryo development and apical meristem
• C. Absence of resin duct and leaf venation
• D. Presence of vessel elements and absence of archegonia

Explanation: (d) : In gymnosperm except Order Gnetales (Gnetum) xylem consist of xylem parenchyma and tracheids with bordered pits but lacks vessels.

• A. Polytrichum
• B. Cedrus
• C. Pteris
• D. Funaria

Explanation: (b) : In gymnosperm (like Cedrus) the male and female gametophyte do not have an independent free living existence.

• A. Adiantum
• B. Equisetum
• C. Dryopteris
• D. Salvinia

Explanation: (d) : The sporophyte of pteridophyte produces meiospores inside sporangia , which may be homosporous (e.g., Equisetum, Adiantum…

• A. A cavity in the ovule in which pollen grains are stored after pollination
• B. An opening in the megagametophyte through which the pollen tube approaches the egg
• C. The microsporangium which pollen grains develop
• D. A cell in the pollen grain in which the sperms are formed

Explanation: (d) : The sporophyte of pteridophyte produces meiospores inside sporangia , which may be homosporous (e.g., Equisetum, Adiantum…

• A. Indusium
• B. Calyptra
• C. Peristome teeth
• D. Elaters.

Explanation: (d) : An elater is a cell (or structure attached to a cell) that is hygroscopic and therefore will change shape in response to changes in…

• A. Zygnema, Saprolegnia, and Hydrilla
• B. Fucus, Marsilea and Calotropis
• C. Riccia, Dryopteris, and Cycas
• D. Anthoceros, Funaria, and Spirogyra

Explanation: (c) : Flagellated male gametes are mostly seen lower groups of plants like algae, bryophytes, pteridophytes.

• A. Nature of stored food materials in the cell
• B. Structural organization of thallus
• C. Chemical composition of the cell wall
• D. Types of pigments present in the cell

Explanation: (d): Algae are a group of chlorophyllous, non­ vascular plants with thallose plant body.

• A. Formation of endosperm before fertilization
• B. Production of seeds from ovules
• C. Lack of xylem tracheids
• D. Absence of pollen tubes

Explanation: a. Conifers belong to gymnosperms. They are seed bearing plants in which the sporophylls are aggregated to form cones and the seeds…