Multiple Choice QuestionsThe family containing mustard and its main characters are
Brassicaceae - Tetramerous flowers, six stamens, bicarpellary gynoecium, siliqua type fruit
Brassicaceae - Pentamerous flowers, many stamens, pentacarpellary gynoecium, capsule type fruit
Solanaceae - Pentamerous flowers, five stamens, bicarpellary gynoecium, berry type fruit
Poaceae - Trimerous flowers, three stamens, monocarpellary gynoecium, caryopsis type of fruit.
A.
Brassicaceae - Tetramerous flowers, six stamens, bicarpellary gynoecium, siliqua type fruit
Brassica or mustard belongs to family Brassicaceae. It is characterised by polypetalous 4 petals, polysepalous 4 sepals, six stamens (which are in tetradynamous condition i.e. 4 + 2. Gynoecium is bicarpellary, syncarpous unilocular with parietal placentation. Fruit is usually siliqua (dry dehiscent fruit formed by bicarpellary syncarpous gynoecium with replum) and rarely lomentum.
Solanaceae is commonly called potato family. It is characterised by bisexual flower, 5 sepals, 5 petals. Androceium is epipetalous and Gynoecium is bicarpellary obligately placed. Fruit is berry or capsule.
Poaceae or Gramineae is a large and nearly ubiquitous family of monocotyledonous flowering plants known as grasses. It is characterised by bracteate flower. It has usually 3 stamens, 3 carpels. Fruit is caryopsis or nut or berry.
Assertion: Ginger has a prostrate-growing rhizome.
Reason: Shoot growth is not effected by gravity
If both Assertion and Reason are true and Reason is the correct explanation of Assertion
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
If Assertion is true but Reason is false
If both Assertion and Reason are false.
Assertion: Photomodulation of flowering is a phytochrome - regulated process.
Reason: Active form of phytochrome (Pfr) directly induces floral induction in shoot buds.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
If Assertion is true but Reason is false
If both Assertion and Reason are false.
Assertion: The epithelial layer of scutellum of maize is both secretory and absorptive in function.
Reason: The epithelial layer secretes hormones into the endosperm for the synthesis of food
solubilising enzymes and also absorbs and transfers the solubiliscd food to embryo axis.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
If Assertion is true but Reason is false
If both Assertion and Reason are false.
Assertion: Deficiency of sulphur causes chlorosis in plants.
Reason: Sulphur is a constituent of chlorophyll, proteins and nucleic acids.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
If Assertion is true but Reason is false
If both Assertion and Reason are false.
Two chief functions of the leaves are
photosynthesis and respiration
photosynthesis and transpiration
transpiration and respiration
respiration and digestion
A flower characterised by monadelphous tubular stamens belongs to :
Solanaceae
Liliaceae
Malvaceae
Brassicaceae
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