Free NEET Biology multiple-choice questions on Gymnosperms & Angiosperms. Attempt each question and reveal the answer with a full explanation.
Conifers differ from grasses in the- Production of seeds from ovules Lack of xylem tracheids Absence of pollen tubes Formation of endosperm before fertilization Vessels are a characteristic feature of angiosperms, but they are also found in which of the following gymnosperm genera? Gnetum Cycas Pinus Cedrus The process of 'double fertilization' is a characteristic unique to: Angiosperms Gymnosperms Pteridophytes Bryophytes In which of the following groups are the seeds not enclosed by any ovary wall and remain exposed? Gymnosperms Angiosperms Pteridophytes Bryophytes The 'Giant Redwood Tree', which is one of the tallest tree species in the world, is a/an: Gymnosperm Angiosperm Pteridophyte Alga Which of the following plants has a superior ovary? Mustard Guava Cucumber Ray florets of sunflower In a floral formula, the symbol G represents: An inferior ovary A superior ovary A half-inferior ovary A syncarpous ovary Which of the following floral symbols indicates an 'epigynous' flower in a floral formula? G G G- The edible part of an Apple is the: Thalamus Pericarp Mesocarp Endosperm Flowers that lack both stamens and carpels and are therefore sterile are known as: Neuter flowers Pistillate flowers Staminate flowers Bisexual flowers In a seed coat, the outer layer is the testa. The inner layer is called the: Tegmen Hilum Micropyle Raphe Besides paddy fields, cyanobacteria are also found inside vegetative part of Pinus Cycas Equisetum Psilotum In which of the following types of placentation are the ovules borne on a central axis and septa are absent? Free central Axile Parietal Marginal Which of the following plants produces non-albuminous (non-endospermous) seeds? Pea Castor Maize Wheat Which of the following plants has an epigynous flower? Guava Mustard China rose Brinjal In mango and coconut, the fruit is known as a drupe. In mango, the edible part is the: Fleshy mesocarp Edible endosperm Epicarp Hard endocarp A scutellum is a part of the embryo in a grain of wheat or maize and is technically considered as a: Single cotyledon Protective sheath of radicle Protective sheath of plumule Endosperm Which part of the flower is represented by the floral formula ♂ K (5) C (5) A 5 G (2) ? Solanaceae Fabaceae Liliaceae Brassicaceae The floral formula Br ♂ ♀ P (3+3) A 3+3 G (3) corresponds to which of the following families? Liliaceae Solanaceae Fabaceae Brassicaceae Basal placentation, where a single ovule is attached at the base of a unilocular ovary, is typically found in: Sunflower and Marigold China rose and Tomato Pea and Bean Mustard and Argemone In some seeds, remnants of nucellus are persistent. This residual, persistent nucellus is called: Perisperm Endosperm Scutellum Aleurone layer Which of the following is a medicinal plant belonging to the family Liliaceae, also known for producing the alkaloid Colchicine? Colchicum autumnale Aloe vera Asparagus Petunia Select the correct statement :- (1) Gymnosperms are both homosporous and heterosporous (2) Salvinia, Ginkgo and Pinusall are gymnosperms (3) Sequoia is one of the tallest trees (4) The leaves of gymnosperms are not well adapted to extremes of climate In gymnosperms, the phloem lacks which of the following components? Sieve tubes and companion cells Sieve cells and albuminous cells Phloem parenchyma Bast fibres Which of the following plants produces seeds that are both dicotyledonous and endospermic? Castor Pea Bean Gram Which of the following features is NOT found in the family Liliaceae? Pentamerous flowers Tricarpellary gynoecium Parallel venation Perianth Gymnosperms are referred to as 'softwood spermatophytes' because they lack: Xylem vessels Phloem parenchyma Thick-walled tracheids Xylem fibres Phloem parenchyma is typically absent in most of the: Monocotyledons Dicotyledons Gymnosperms Pteridophytes The wood of gymnosperms is called 'non-porous' because it lacks: Vessels Tracheids Xylem fibres Xylem parenchyma Xylem vessels are a characteristic feature of: Angiosperms Gymnosperms Pteridophytes Bryophytes Which of the following is an example of an endospermic (albuminous) seed among dicots? Castor Pea Bean Groundnut Orchid seeds are often described as having which of the following characteristics? Non-endospermic and very small Endospermic and very large Non-endospermic and very large Endospermic and very small Castor seed is unique among dicots because it is typically: Albuminous (Endospermic) Ex-albuminous (Non-endospermic) Apomictic Parthenocarpic Identify and select the wrong statement out of the following: In conifers the needle like leaves are well adapted to extremes of temperature, moisture conservation and onslaught of wind. Roots of pines enter into a symbiotic relationship with higher fungi. The coralloid roots in Cycas have nitrogen fixing cyanobacteria The giant redwood tree Sequoia, one of the tallest trees is an angiosperm. Nucellar polyembryony is frequently observed in which of the following plant genera? Citrus Brassica Triticum Zea Top-shaped multiciliate male gametes, and the mature seed which bears only one embryo with two cotyledons, are characteristic features of - Gamopetalous angiosperms Conifers Polypetalous angiosperms Cycads In gymnosperms, the pollen chamber represents a cavity in the ovule in which pollen grains are stored after pollination an opening in the megagametophyte through which the pollen tube approaches the egg the microsporangium in which pollen grains develop a cell in the pollen grain in which the sperms are formed. Which one of the following plants is monoecious ? Papaya Marchantia Pinus Cycas Given below are two statements : One labelled as Assertion A and the other labelled as Reason R : Assertion A : In gymnosperms the pollen grains are released from the microsporangium and carried by air currents. Reason R : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed. In the light of the above statements, choose the correct answer from the options given below : Both A and R are true and R is the correct explanation of A Both A and R are true but R is NOT the current explanation of A A is true but R is false A is false but R is true Identify the correct floral formula for the family Solanaceae. ⊕ ☑ K (5) C (5) A 5 ′G (2) ⊕ ☑ K (5) C 1+2+(2) A (9)+1 ′G 1 ⊕ ☑ K 5 C 5 A 5+5 ′G (3) % ☑ K (5) C (5) A 5 ′G (2) Given below are two statements: Statement I: In gymnosperms, the male and female gametophytes remain within the sporangia. Statement II: In gymnosperms, seeds are not covered. In the light of the above statements, choose the most appropriate answer from the options given below: Both Statement I and Statement II are correct Both Statement I and Statement II are incorrect Statement I is correct but Statement II is incorrect Statement I is incorrect but Statement II is correct Which of the following statements is correct? Horsetails are gymnosperms Selaginella is heterosporous, while Salvinia is homosporous Ovules are not enclosed by ovary wall in gymnosperms Stems are usually unbranched in both Cycas and Cedrus Winged pollen grains are present in Mango Cycas Mustard Pinus Phloem in gymnosperms lacks : (1) Both sieve tubes and companion cells (2) Albuminous cells and sieve cells (3) Sieve tubes only (4) Companion cells only Which one of the following is the characteristic feature of gymnosperms? Gymnosperms have flowers for reproduction Seeds are enclosed in fruits Seeds are naked Seeds are absent In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed? Pinus Wolffia Funaria Selaginella