Class XI Biology
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300 questions in this chapter
Question 241 of 300
ð CLASS XI
Match the embryonal axis components of a dicot seed with their roles:
Column I (Embryonal Axis Part)
Column II (Precursor / Description)
(a) Plumule
(i) Part of embryonal axis that develops into the future root system
(b) Radicle
(ii) Part of embryonal axis that develops into the future shoot system
(c) Cotyledons
(iii) Fleshy food-storing structures, two in number
The plumule develops into the shoot system, the radicle develops into the root system, and the two cotyledons act as food-storing structures in dicot seeds.
Question 242 of 300
ð CLASS XI
Match the monocotyledonous seed structures with their descriptions:
Column I (Monocot Seed Structure)
Column II (Description)
(a) Fused outer covering
(i) Seed coat is membranous and fused with the fruit wall
(b) Aleurone layer
(ii) Proteinous layer separating embryo from endosperm
(c) Scutellum
(iii) Single, large and shield-shaped cotyledon
In cereals like maize, the seed coat is fused with the fruit wall. The aleurone is the outer protein-rich layer of the endosperm, and the scutellum is the single shield-shaped cotyledon.
Question 243 of 300
ð CLASS XI
Match the protective sheaths of a monocot embryo with their enclosed structures:
Column I (Protective Sheath)
Column II (Enclosed Structure)
(a) Coleoptile
(i) Encloses the radicle
(b) Coleorhiza
(ii) Encloses the plumule
(c) Scutellum
(iii) Large shield-shaped cotyledon
The coleoptile encloses the plumule, the coleorhiza encloses the radicle, and the scutellum is the large shield-shaped cotyledon.
Question 244 of 300
ð CLASS XI
Match the semi-technical floral symbols with their descriptions:
Column I (Floral Formula Symbol)
Column II (Meaning)
(a) Br
(i) Calyx
(b) K
(ii) Corolla
(c) C
(iii) Perianth
(d) P
(iv) Bracteate flower
Br denotes a bracteate flower, K represents calyx, C represents corolla, and P represents perianth in floral formulae.
Question 245 of 300
ð CLASS XI
Match the symbols representing the reproductive whorls and ovary positions:
Column I (Symbol)
Column II (Meaning)
(a) A
(i) Androecium
(b) G
(ii) Gynoecium
(c) G
(iii) Superior ovary
(d) GĖ
(iv) Inferior ovary
A denotes androecium, G denotes gynoecium, an underlined G indicates a superior ovary, and an overlined G indicates an inferior ovary.
Question 246 of 300
ð CLASS XI
Match the symbols representing sexuality and symmetry in floral formulas:
Column I (Symbol)
Column II (Meaning)
(a) â
(i) Actinomorphic symmetry
(b) %
(ii) Zygomorphic symmetry
(c) âĨ
(iii) Bisexual flower
â denotes actinomorphic symmetry, % denotes zygomorphic symmetry, and âĨ denotes a bisexual flower.
Question 247 of 300
ð CLASS XI
Match the Solanaceae vegetative characteristics with their details:
Column I
Column II
(a) Alternate leaves
(i) Reticulate venation
(b) Underground stem
(ii) Potato (Solanum tuberosum)
(c) Venation
(iii) Exstipulate and simple (rarely pinnately compound)
Solanaceae generally has alternate, simple, exstipulate leaves with reticulate venation, and potato possesses an underground stem.
Question 248 of 300
ð CLASS XI
Match the floral whorls of Solanaceae with their diagnostic conditions:
Column I
Column II
(a) Calyx
(i) Five united sepals, persistent, valvate
(b) Corolla
(ii) Five united petals, valvate
(c) Androecium
(iii) Five epipetalous stamens
(d) Gynoecium
(iv) Bicarpellary, syncarpous, superior ovary, axile placentation
The floral formula of Solanaceae includes a persistent gamosepalous calyx, gamopetalous corolla, five epipetalous stamens, and a bicarpellary syncarpous superior ovary with axile placentation.
Question 249 of 300
ð CLASS XI
Match the Solanaceae economic categories with their representative species:
Column I
Column II
(a) Food
(i) Tomato, Brinjal, Potato
(b) Spice
(ii) Chilli
(c) Medicine
(iii) Belladonna, Ashwagandha
(d) Fumigatory & Ornamental
(iv) Tobacco, Petunia
Tomato, brinjal and potato are food crops; chilli is a spice; belladonna and ashwagandha are medicinal plants; tobacco is fumigatory and petunia is ornamental.
Question 250 of 300
ð CLASS XI
Match the floral formula features of Solanaceae with their symbolic representation:
Column I (Feature)
Column II (Symbol)
(a) Actinomorphic symmetry
(i) â
(b) Epipetalous stamens
(ii) Overline joining C and A
(c) Bicarpellary syncarpous superior ovary
(iii) G(2)
â denotes actinomorphic symmetry, the connecting line indicates epipetalous stamens, and underlined G(2) represents a superior bicarpellary syncarpous ovary.
