NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 9 of 104)
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- In lettuce, red light is most effective in breaking seed dormancy because it
- Stimulates water absorption
- Reverses inhibitory effect of far-red light
- Enhances respiratory rate
- Breaks down ABA
- How many meiotic divisions are required to produce 12 pollen grains in Cyperaceous?
- 3
- 4
- 6
- 12
- Which one of the following plants is being used as a model system to study developmental genetics of zygotic embryo genesis?
- Arabidopsis thaliana
- Daucus carota
- Zea mays
- Capsella bursa-pastoris
- Which one of the following pairs is NOT correctly matched?
- Match Item 1: Neem
- Match Item 2: Azadirachtin
- Match Item 1: PEG
- Match Item 2: Protoplast fusion
- Match Item 1: Gybogenesis
- Match Item 2: Haploids
- Match Item 1: Wheat
- Match Item 2: 2-celled pollen
- In angiosperms, which one of the following processes does NOT involve an unequal division?
- Formation of microspores
- Formation of generative cell
- Zygotic embryogenesis
- Helobial endosperm development
- The male germ unit (MGU) in angiosperms comprises of
- Vegetative nucleus and the generative cell
- The two sperm cells
- Vegetative nucleus and one of the sperms
- Vegetative nucleus arid the two sperms
- Match list I with list II and select the correct answer:
Table Supporting: NET, IAS, State-SET (KSET, WBSET, MPSET, Etc.) , GATE, CUET, Olympiads Etc. : Botany MCQs (Practice_Test 9 of 104) List-I List-II - Pollinia
- Aril
- Virus elimination
- Tip growth
- Litchi
- Pollen tube
- Orchids
- Meristem culture
- Paleontology
- A
- B
- C
- D
- 3
- 2
- 4
- 5
- 2
- 1
- 3
- 4
- 4
- 3
- 5
- 2
- 3
- 1
- 4
- 2
- Cleistogamy is found in
- Ficus
- Commelina
- Vallisnerea
- Anthocephalus
- When the pollen of one flower pollinates another flower on the same plant, it is called
- Autogamy
- Geitonogamy
- Allogamy
- Xenogamy
- Which one of the following technique has been widely used to overcome sexual incompatibility?
- In vitro fertilization
- Geitonogamy
- Allogamy
- Xenogamy
- The pollen tube discharges its contents in
- The egg
- One of the synergids
- The central cell
- One of the antipodal cells
- Pollen tube growth is an example of
- Geotropism
- Chemotropism
- Thigrnotropism
- Heliotropism
- Formation of callose wall occurs during
- Embryogenesis
- Endosperm development
- Megasporogenesis
- Seed germination
- Embryo maturation is favoured by:
- IAA
- 2,4 − D
- BAP
- ABA
- The envelope of the embryonic shoot in maize seed is called
- Testa
- Tegrnen
- Scutellum
- Coleoptile