Free Biodiversity and Variety of Life MCQs with Answers

• A. Mustard
• B. Soybean
• C. Gram
• D. Sorghum

Explanation: Palisade parenchyma is absent in the leaves of Sorghum. It is a monocot plant where the parenchyma tissues of the leaves are not…

• A. Elongating
• B. Widening
• C. Differentiating
• D. Maturing

Explanation: Annular and spiral thick carrier elements usually develop in the protoxylem when the roots or stems are maturing.

• A. Absence of secondary phloem
• B. Presence of cortex
• C. Position of protoxylem
• D. Absence of secondary xylem

Explanation: Procambium, which is a meristematic tissue, gives rise to the primary xylem and phloem.

• A. Periblem
• B. Dermatogen
• C. Phellogen
• D. Plerome

Explanation: Dermatogen is the region or histogen of a single layer of outermost cells formed from the apical meristem.

• A. Size of leaf lamina at the node below each internode
• B. Intercalary meristem
• C. Shoot apical meristem
• D. Position of axillary buds

Explanation: Internode is the part of a plant stem, that occurs between two adjacent nodes.

• A. Idioblast
• B. Bacteriochlorophyll
• C. Invertase
• D. Pepsin

Explanation: The major storage component of Avocado fruit is oil. It is stored in specialized mesocarp cells called idioblast.

• A. Alpine region
• B. Cold winter regions
• C. Temperature climate
• D. Tropics

Explanation: In most of the gymnosperms, like conifers and cycads, vessels are absent and the wood is made entirely of trach eids.

• A. Dicot root
• B. Monocot root
• C. Dicot stem
• D. Monocot stem

Explanation: The vascular tissue of the root is characterized by radial arrangement of vascular bundles i.e., xylem and phloem occur in separate…

• A. All angiosperms and some gymnosperm
• B. Most of angiosperms and few gymnosperms
• C. All angiosperms, all gymnosperms and some pteridophyta
• D. All pteridophyta

Explanation: Vessels are long tubelike structures ideally suited for the conduction of water and solutes.

• A. Reserved material
• B. Wastes
• C. Excretory material
• D. Insect attracting material

Explanation: Inulin is a water soluble fructosan. It is a common reserve food in members of family compositae.

• A. Differentiation of procambium, formation of primary phloem followed by formation of primary xylem
• B. Differentiation of procambium followed by the formation of primary phloem and xylem simultaneously
• C. Formation of procambium, primary phloem and xylem simultaneously
• D. Differentiation of procambium followed by the formation of secondary xylem

Explanation: In plants during vascularisation, differentiation of procambium occurs followed by the formation of primary phloem and xylem…

• A. Reticulate venation
• B. Absence of bulliformcells from epidermis
• C. Mesophyll not differentiated into palisade and spongy tissues
• D. Well-differentiated mesophyll

Explanation: In monocot leaf, mesophyll cells are not differentiated into palisade and spongy tissues.

• A. Organic food moves up through phloem
• B. Organic food moves up through xylem
• C. Inorganic food moves upwardly and downwardly through xylem
• D. Organic food moves upwardly and downwardly through phloem

Explanation: Phloem is the food-conducting tissue of plants. The sieve tubes are food-conducting elements of the plants.

• A. Vessels
• B. Xylem parenchyma
• C. Sieve tubes
• D. Tracheids

Explanation: An organised and differentiated cellular structure having cytoplasm but no nucleus are sieve tubes. The sieve tubes are living cells.

• A. Sclerenchyma
• B. Parenchyma
• C. Collenchyma
• D. Chlorenchyma

Explanation: During the evolution of megaphylls, the spaces between the overtopped dichotomous branches were occupied by a sheet of parenchyma cells.

• A. Naked ovules
• B. Seems like monocot
• C. Circinate ptyxis
• D. Compound leaves

Explanation: Cycas is a gymnosperm with exposed ovules (not enclosed in an ovary), unlike angiosperms.

• A. Fungi
• B. Plantae
• C. Animalia
• D. All of these

Explanation: All three groups-Fungi, Plantae, and Animalia-evolved from protists, sharing a common eukaryotic ancestors.

• A. It has circinate vernation
• B. Its xylem is mainly composed of xylem vessel
• C. Its roots contain some blue-­green algae
• D. It does not have a well-organized female flower

Explanation: Cycas lacks xylem vessels; it has only tracheids, unlike angiosperms.

• A. Banyan
• B. Cycas
• C. Thuja
• D. Pinus

Explanation: Cycas produces large, visible, motile sperms which is the largest among plants.

• A. Filamentous alga lacking flagellated reproductive stages
• B. Membranous alga producing zoospores
• C. Filamentous alga with flagellate reproductive stages
• D. Non-­motile colonial alga lacking zoospores

Explanation: Ulothrix produces flagellated reproductive cells and is filamentous in shape.