Q761
Open questionThe teliospores are readily carried from the smutted ears by air current at the time when the healthy plants are in the
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Biology GK · all questionsPlant Anatomy and Physiology
Plant Anatomy and Physiology
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Q762
Open questionMaximum photosynthetic activity occurs in
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Q763
Open questionThe process of water exudation, in guttation, usually takes place through certain specialized structures known as
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Q764
Open questionWhich light is most effective in photosynthesis?
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Q765
Open questionWhich of the following element is not a micronutrient for plants?
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Q766
Open questionLight energy changes into the chemical energy by which of the following process?
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Q767
Open questionThe electron transport carriers of chloroplasts are located in the
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Q768
Open questionThe CO2 concentration at a given constant light intensity at which there is a balance between photosynthetic assimilation and respiration is called as
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Q769
Open questionThe condition where some plants never open to ensure complete self-pollination is known as
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Q770
Open questionThermal migrations occur in
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Q771
Open questionConsider the following statements and choose the correct answer:
1. Preparations of tRNA from plant sources contain cytokinins
2. Cytokinins most likely influence protein synthesis through their involvement in the attachment to tRNA to the ribosome-mRNA complex during protein synthesis
3. The synthetic cytokinins 6-BAP and kinetin influence the production of viruses in certain host systems
1. Preparations of tRNA from plant sources contain cytokinins
2. Cytokinins most likely influence protein synthesis through their involvement in the attachment to tRNA to the ribosome-mRNA complex during protein synthesis
3. The synthetic cytokinins 6-BAP and kinetin influence the production of viruses in certain host systems
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Q772
Open questionThe most important method of conservation of pollutants is
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Q773
Open questionAccording to Hansel, which of the following ranges of temperature is equally efficient in shortening the number of days to flowering in Petkus winter rye?
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Q774
Open questionThe organisms which secrete digestive enzymes to break down food into smaller substances and then absorb the digested food are known as
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Q775
Open questionWhich of the following non-succulent perennials shed their leaves soon after the rainy season is over?
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Q776
Open questionMatch List-I with List-II and select the correct answer:
| List-I (parts of ovule) | List-II (Structure and Location) |
| a. Hilum | 1. Place of origin of integument or basal swollen part of the nucellus |
| b. Raphe | 2. Narrow pore passage formed by the projection of the integuments through which the pollen tube enters into the ovule |
| c. Micropyle | 3. The point the attachment of the body of the ovule with the funiculus |
| d. Chalaza | 4. The longitudinal ridge formed by lengthwise fusion of funiculus with the body of ovule in a typical anatropous ovule |
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Q777
Open questionBefore the abscission of a plant organ, a layer of tissue is usually formed at the base of the organ; this layer of tissue is referred to as
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Q778
Open questionConsider the following statements regarding the general symptoms of diseases and choose the correct answer:
1. The charges in the host which serve to recognise the disease are called the signs and symptoms of the disease
2. The sign of a disease is the external appearance of some portion of the pathogen of the host
3. The symptoms are the visible effects which the host plant induces on the parasites
4. Any visible deviation on the host plant from the normal structure and function is called a symptom
1. The charges in the host which serve to recognise the disease are called the signs and symptoms of the disease
2. The sign of a disease is the external appearance of some portion of the pathogen of the host
3. The symptoms are the visible effects which the host plant induces on the parasites
4. Any visible deviation on the host plant from the normal structure and function is called a symptom
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Q779
Open questionThe devernalization of the vernalized grains of Petkus winter rye may be accomplished by
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Q780
Open questionConsider the following statements regarding the crassulacean acid metabolism (CAM) plants and choose the correct answer:
1. CAM plants can synthesize large amounts of malic and isocitric acids at night
2. These are found in dry habitats
3. These are succulents with thick fleshy leaves, or, when leaves are absent, a swollen photosynthetic stem
4. These plants are generally slow growing
1. CAM plants can synthesize large amounts of malic and isocitric acids at night
2. These are found in dry habitats
3. These are succulents with thick fleshy leaves, or, when leaves are absent, a swollen photosynthetic stem
4. These plants are generally slow growing
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