Which of the following describes a perianth?
In some flowers like lily, the calyx and corolla are not distinct and are collectively called the perianth.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
#flower anatomy
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Which term describes a flower in which the ovary is positioned above other floral parts?
In hypogynous flowers, the ovary is superior and occupies the highest position, as seen in mustard.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
Which part of a flower matures into the fruit after fertilization?
The ovary matures into a fruit, while the ovules develop into seeds after fertilization.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
Which of the following correctly describes free central placentation?
In free central placentation, as seen in Dianthus, ovules are attached to a central axis, and the ovary lacks septa.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
Which of the following terms describes flowers in which the ovary occupies the highest position on the thalamus?
In hypogynous flowers, such as mustard, the ovary is superior and occupies the highest position on the thalamus.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
Which term describes a flower with both androecium and gynoecium?
Bisexual flowers have both male (androecium) and female (gynoecium) reproductive organs.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
Which part of the flower is responsible for producing pollen?
The anther is part of the stamen and is responsible for producing pollen grains.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
When sepals and petals are indistinguishable, they are called
When perianth segments are indistinguishable in colour, texture and shape, each segment termed tepal to avoid mischaracterization as sepal or petal; collectively they form perigonium or perigone. Perianth remains general term for outer whorls ensemble, perigone sometimes used synonymously but strictly means true perigonium in lilioid monocots. Bracteoles are small bracts borne on pedicel, not perianth parts. Tepals occur prominently in Liliaceae, Palmae, Amaryllidaceae usually six arranged in two whorls 3+3 with petaloid colouration and valvate aestivation. Tepal terminology emphasizes homochlamydeous condition considered primitive within monocotyledons.
Ref: NCERT Class 11, Tepal terminology Liliaceae; Simpson, Plant Systematics, perigonium monocots
Epipetalous stamens are characteristic of
Epipetalous condition refers to stamens whose filaments are adnate to corolla tube, anthers remain free and introrse, ensuring pollen presentation near pollinator entry. This synorganization promotes effective nototribic and sternotribic pollination. Solanaceae displays five epipetalous, polyandrous stamens alternating with corolla lobes, valvate aestivation, superior ovary with swollen placenta. Fabaceae shows diadelphous condition not epipetalous, Malvaceae monadelphous staminal column, Brassicaceae tetradynamous free from petals. Presence of epipetalous stamens diagnostically identifies gamopetalous families evolved for specialized entomophily and buzz pollination in Solanum.
Ref: Campbell Biology, 12th ed., Chapter 38: Angiosperm Reproduction, Epipetalous androecium in Solanaceae
The proximal end of the filament of a stamen is attached to which part of the flower?
The filament is the long, slender stalk of the stamen. Its proximal end (the base) is attached to the Thalamus (receptacle) or sometimes to the Petal (epipetalous condition). The distal end bears the Anther.
Ref: Diagram of a flower highlighting the attachment point of the stamen filament.