Structural Organisation in Animals and Plants

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Match List I with List II :List I: A. Scutellum B. Non-albuminous seed C. Epiblast D. PerispermList II: I. Persistent nucellus II. Cotyledon of Monocot seed III. Groundnut IV. Rudimentary cotyledonChoose the option with all correct matches. Answer: 1. A-II, B-III, C-IV, D-I Key idea: Seed structure terms. Scutellum is the single cotyledon of a monocot (grass) seed: A-II. Non-alb... Flower, fruit and seed 1 answer
Which of the following is an example of a zygomorphic flower? Answer: 3. Pea Key idea: A zygomorphic flower can be divided into two equal halves in only one vertical plane. Pea (papilionaceous corolla)... Flower, fruit and seed 1 answer
In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called : Answer: 4. Aleurone layer Key idea: The aleurone layer is the outer protein-rich layer of the endosperm in cereal grains, separating it from... Flower, fruit and seed 1 answer
Find the statement that is NOT correct with regard to the structure of monocot stem. Answer: 1. Hypodermis is parenchymatous. Key idea: In a monocot stem the hypodermis is sclerenchymatous, not parenchymatous. The other state... Plant tissues and anatomy of root, stem, leaf 1 answer
Given below are two statements :Statement I : In a floral formula ⊕ stands for zygomorphic nature of the flower, and G (underlined) stands for inferior ovary.Statement II : In a floral formula ⊕ stands for actinomorphic nature of the flower and G (un… Answer: 4. Statement I is incorrect but statement II is correct Key idea: In floral formulae the symbol oplus means actinomorphic (radial sy... Flower, fruit and seed 1 answer
Match List I with List IIList I (Types of Stamens): A. Monoadelphous; B. Diadelphous; C. Polyadelphous; D. EpiphyllousList II (Example): I. Citrus; II. Pea; III. Lily; IV. China-roseChoose the correct answer from the options given below: Answer: 2. A-IV, B-II, C-I, D-III Key idea: classify stamens by how filaments are united. Monoadelphous (one bundle): China-rose (IV). Diade... Flower, fruit and seed 1 answer
Match List I with List IIList I: A. Rose; B. Pea; C. Cotton; D. MangoList II: I. Twisted aestivation; II. Perigynous flower; III. Drupe; IV. Marginal placentationChoose the correct answer from the options given below: Answer: 2. A-II, B-IV, C-I, D-III Key idea: match the plant with its floral feature. Rose: perigynous flower (II). Pea: marginal placentatio... Flower, fruit and seed 1 answer
Identify the part of the seed from the given figure which is destined to form root when the seed germinates. Answer: 4. C Key idea: in a monocot seed (grain), the radicle lies inside a protective sheath called the coleorhiza. In the figure, A is the... Flower, fruit and seed 1 answer
Which of the following is an example of actinomorphic flower? Answer: 2. Datura Key idea: actinomorphic flowers can be cut into two equal halves in any vertical plane (radial symmetry). Datura is actino... Flower, fruit and seed 1 answer
Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary from the given figures (a) and (b) Answer: 1. (a) Perigynous; (b) Perigynous Key idea: the position of the thalamus and the other whorls decides hypogynous, perigynous or epig... Flower, fruit and seed 1 answer
Bulliform cells are responsible for Answer: 2. Inward curling of leaves in monocots. Key idea: bulliform cells are large colourless cells on the upper epidermis of grass leaves... Plant tissues and anatomy of root, stem, leaf 1 answer
In the given figure, which component has thin outer walls and highly thickened inner walls? Answer: 2. C Key idea: in dicot guard cells the wall facing the stomatal pore (inner wall) is thick and the outer wall is thin. In the figur... Plant tissues and anatomy of root, stem, leaf 1 answer
Given below are two statements:Statement I : Parenchyma is living but collenchyma is dead tissue.Statement II : Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms.In the light of the above statements, ch… Answer: 1. Statement I is false but Statement II is true Key idea: check each statement against tissue properties. Statement I: Parenchyma i... Plant tissues and anatomy of root, stem, leaf 1 answer
Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :Assertion A : A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem.Reason R : Internode of the shoot… Answer: 2. Both A and R are true and R is the correct explanation of A. Key idea: A flower is a modified shoot in which the shoot apical mer... Flower, fruit and seed 1 answer
Axile placentation is observed in Answer: 1. China rose, Petunia and Lemon Key idea: Axile placentation (ovary with two or more chambers, ovules on central axis) is found in... Flower, fruit and seed 1 answer
Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :Assertion A : Late wood has fewer xylary elements with narrow vessels.Reason R : Cambium is less active in winters.In the light of the above statem… Answer: 2. Both A and R are true and R is the correct explanation of A. Key idea: In winter the cambium is less active and forms fewer xylar... Plant tissues and anatomy of root, stem, leaf 1 answer
Given below are two statements :Statement I : Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.Statement II : Exarch condition is the most common feature of the root system.In the light of t… Answer: 1. Statement I is incorrect but Statement II is true. Key idea: Endarch and exarch describe the position of primary xylem. Statement... Plant tissues and anatomy of root, stem, leaf 1 answer
Identify the correct statements :A. Lenticels are the lens-shaped openings permitting the exchange of gases.B. Bark formed early in the season is called hard bark.C. Bark is a technical term that refers to all tissues exterior to vascular cambium.D.… Answer: 3. A and D only Key idea: Check each statement. A is true: lenticels allow gas exchange. B is false: bark formed early in the season... Plant tissues and anatomy of root, stem, leaf 1 answer
Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the stamens, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae. Answer: 2. Diadelphous and Dithecous anthers Key idea: Fabaceae has diadelphous stamens (9 + 1) with dithecous anthers. Solanaceae and Lilia... Families: Malvaceae, Cruciferae, Leguminosae, Compositae, Gramineae 1 answer
Which part of the fruit, labelled in the given figure makes it a false fruit ? Answer: 4. C → Thalamus A false fruit develops from parts other than the ovary, here the thalamus. In the figure (apple), the large outer fl... Flower, fruit and seed 1 answer
The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood.(a) It is also called as the earlywood(b) In spring season cambium produces xylem elements with narrow vessels(c) It is lighter in colour(… Answer: 3. (a), (c), (d) and (e) Only (a) Springwood is also called earlywood: true. (b) It has wide vessels, not narrow: false. (c) It is l... Plant tissues and anatomy of root, stem, leaf 1 answer
Which one of the following plants shows vexillary aestivation and diadelphous stamens ? Answer: 3. Pisum sativum Vexillary (papilionaceous) aestivation with diadelphous stamens (9+1) is typical of the pea family, Fabaceae. Pisum... Families: Malvaceae, Cruciferae, Leguminosae, Compositae, Gramineae 1 answer
Identify the correct set of statements :(a) The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea(b) Axillary buds form slender and spirally coiled tendrils in cucumber and pumpkin(c) Stem is flattened and fleshy in Opuntia a… Answer: 4. (b), (c), (d) and (e) Only (a) In Citrus and Bougainvillea, axillary buds (stems) become thorns, not leaflets: false. (b) Axillar... Morphology: root, stem, leaf and modifications 1 answer
"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which : Answer: 3. food is transported In the girdling experiment, a ring of bark (with phloem) is removed from a stem. Food accumulates above the r... Plant tissues and anatomy of root, stem, leaf 1 answer

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