NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Botany MCQs (Practice_Test 42 of 104)
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- Which one of the following types of vegetations allows quick absorption of maximum rain water?
- Wet evergreen forests
- Grasslands
- Scrub forests
- Deciduous forests
- Consider the following statements regarding allelopathy:
- It is the phenomenon of seed dormancy due to the presence germination inhibitors on the surface of seed coat.
- It is the phenomenon of the production of organic substances by one plant having handful effect on the other.
- It helps proper spacing of the plants to reduce competition.
- It helps the xerophytes to grow in small groups to reduce the transpiration.
- Of these statements:
- 1,2 and 3 are correct
- 1 and 3 are correct
- 2 and 3 are correct
- 1 and 4 are correct
- Nepenthes Khasiana, a rare and endangered pither plant, occurs in India in
- Meghalaya
- Madhya Pradesh
- Kerala
- Himachal Pradesh
- Which of the following statements are correct?
- callus is the disorganized mass of cells formed under in vitro condition.
- totipotency is the ability of a plant organ to regenerate an entire organism when cultured in a suitable medium.
- embroyoid is the embroyo-like structure formed under in vitro condition which has the potentiality to develop into a plantlet.
- explant is the excised portion of plant tissue or organ which is used in tissue culture study.
- Select the correct answer using the codes given below:
- Codes:
- 1,2 and 4
- 1,3 and 4
- 1,2 and 3
- 2,3 and 4
- Which of the following pairs are correctly matched?
- Match Item 1: Somatic hybridization
- Match Item 2: Protoplast fusion
- Match Item 1: Industry
- Match Item 2: Bioreactors
- Match Item 1: Test-tube baby
- Match Item 2: Artificial fertilization
- Match Item 1: Monoclonal
- Match Item 2: Gene therapy
- Select the correct answer using the codes given below:
- Codes:
- 2,3 and 4
- 1,3 and 4
- 1,2 and 4
- 1,2 and 3
- ՚superbug a biotechnological feat is useful in the
- Treatment of Cancer
- Cleaning oil Spillage
- Espionage
- Biodegradation of plastics
- Which one of the following statements regarding Pomato is correct?
- It is a product of somatic hybridization
- It is obtained by gene manipulation
- It is a natural hybrid product of sexual reproduction
- It is the fusion product of archegonia and antheridia
- Which one of the following gases was primarily responsible for the 1984 Bhopal gas tragedy?
- Methane
- Methyl cyanide
- Methyl isocyanine
- Hydrogen cyanide
- Depletion of the Ozone layer in the stratosphere is caused by
- Carbon monoxide
- Hydrocarbons
- Nitrogen dioxide
- Polychloro-biphenyls
- A forestation with the pin pose of environmental, aesthetic and economic development is known as
- Integrated afforest ion
- Scientific forest conservation
- Social forestry
- Integrated forest management
- A forestation programmes call for the introduction of plants form
- Desert regions as these can withstand adverse conditions
- Arctic environment because of their short stature and sturdiness
- Iso-climatic regions
- And environment of maximum heterogene1t
- The uniform peeling away of the soil surface by the action of flowing water is Called
- Slip erosion
- Till erosion
- Accelerated erosion
- Sheet erosion
- Consider the following steps in plant introduction:
- Site selection and study.
- Quarantine⟋plant protection inspection.
- Species selection and import of seeds.
- Seed treatment, nursery development and planting.
- The correct sequence of these steps is
- 4,2, 1,3
- 3,4, 2,1
- 1,3, 2,4
- 2,1, 4,3
- When exposed to sulphur dioxide gas, the green color of the plant leaves will be changed into
- Violet
- Indigo
- Red
- yellow
- Which one of the following aspects will not alter the gene frequency in a population?
- Section
- Mutation
- Random mating
- Random genetic drift