NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 70 of 104)
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- Phytohoromone is a naturally produced organic substance in
- Higher plants which controls growth and development in general
- Plants to control growth and physiological functions at the site of its production
- Higher plants controlling growth and development at a site far removed from the site of its production and is effective only when present in large quantities
- Higher plants controlling physiological and growth functions at a site quite removed form the site of its production and is effective when present even in minute quantities
- Sprouting of potatoes whiLe in storage can be prevented by
- Treatment with low concentrations e4 urea
- Treatment with low concentrations of naphthalene acetic acid
- Treatment with low concentrations of nicotinamide
- Exposure to sunlight and storage at low temperatures
- An agar block containing 5 g of IAA was placed on a decapitated coleoptiles stump, as shown in the given figure. After some time an angle of curvature, z was measured. If this agar block was replaced by another one containing 8 g of IAA, then
- Angle a Will become narrower
- Angle a Will widen
- Angle a will remain the same as before
- The coleoptiles will shrink
- A biennial plant is one which
- Lives for two years but flowers towards the end of the second year
- Produces two sets of flowers in a year
- Grows during the second year from seeds shed turning the previous year
- Lives and grows from year to year
- Consider the following statements associated with the germination of an angiosperm us seed:
- As the seed gets hydrated and germinates. Enzymatic activity is increased.
- The respiration rate of the germinating seed increases along with the increased enzymatic activity.
- The increase in the respiratory rate continues till senescence.
- Of these statements
- 1,2 and 3 are correct
- 1 and 2 are correct
- 2 and 3 are correct
- 1 and 3 are correct
- Flagellated motile stages occur in the life cycles of
- Ulothrix and Spirulina
- Spirogyra and Chlamydomonas
- Dictyota and Batrachospermum
- Ectocrpus and Volvox
- Match List I (plant) with List II (type of pollination according to the agency of pollination) and select the correct answer using the codes given below the lists:
Table Supporting: NET, IAS, State-SET (KSET, WBSET, MPSET, Etc.) , GATE, CUET, Olympiads Etc. : Botany MCQs (Practice_Test 70 of 104) List-I List-II - Maize (Zea)
- Snapdragon (Antirrhinum)
- Silk cotton (Salmalia)
- Vallisneria spirals
- Hydrophilous
- Chiropterophilous
- Entomophilous
- Anemophilous
- Omithophilous
- A
- B
- C
- D
- 4
- 5
- 2
- 1
- 4
- 3
- 5
- 1
- 2
- 3
- 5
- 4
- 3
- 1
- 2
- 4
- The given diagram shows the carpel of a flowering plant. After fertilization, many structures undergo change to produce parts of fruit⟋seed. Fruit wall, embryo, endosperm and seed coat are shown in the diagram labeled respectively as
- 3,5, 8 and 6
- 3,7, 8 and 4
- 9,6, 5 and 4
- 9,7, 5 and 3
- Which of the following pairs of structure⟋process and plants are correctly matched?
- Match Item 1: Pollinia
- Match Item 2: Orchidaceous
- Match Item 1: Intra-ovarian
- Match Item 2: Pap aver fertilization
- Match Item 1: Myrmecophilous
- Match Item 2: Citrus pollination
- Select the correct answer using the codes given below:
- Codes:
- l, 2 and 3
- l and 3
- l and 2
- 2 and 3
- Match List I with List II and select the correct answer using the codes given below the lists:
Table Supporting: NET, IAS, State-SET (KSET, WBSET, MPSET, Etc.) , GATE, CUET, Olympiads Etc. : Botany MCQs (Practice_Test 70 of 104) List-I List-II - Smallest seed
- Pneumatophores
- Germination in maize
- Changing sites of plumule, radical, cotyledon
- Mangroves
- Mesogeal
- Sedges
- N⟋A
- A
- B
- C
- D
- 1
- 2
- 3
- 4
- 4
- 1
- 3
- 2
- 4
- 1
- 2
- 3
- 1
- 2
- 4
- 3
- The growth from zygote to embryo to seedling and subsequent development into an adult plant is continuous in
- Ruppia
- Ruta
- Roupellia
- Rhizophora
- In the mature pollen grains of angiosperms, recognition proteins are located in the
- Bulbine
- Intine
- Nexine
- Exine
- Consider the following statements regarding growth movements in plants:
- Growth movements in flowering plants are always induced by external stimuli such as light and gravity.
- Differential growth of cells in different parts of the affected organ is responsible for growth movement.
- Growth movements are very slow and can be observed only through timelapse photography.
- Of these statements
- 1,2 and 3 are correct
- I and 2 are correct
- 2 and 3 are correct
- 1 and 3 are correct
- Which one of the following is typical of a monocot embryo? Plumule Radical Cotyldon
- Terminal Axial Lateral
- Lateral Axial Terminal
- Lateral Terminal Axial
- Axial Lateral Terminal
- Which one of the following is the perfect state of the fungus causing tikka disease of groundnut?
- Puccinia arachidis
- Mycosphaerella berkeleyii
- Dipldia arachidis
- Colletotrichum dematium