Description : The response of different organisms to the environmental rhythms of light and darkness is called (a) vernalization (b) photoperiodism (c) phototaxis (d) phototropism.
Last Answer : b) photoperiodism
Description : Flowering in water melon is unaffected by light duration as it is: a. Short day long night plant b. Long day short night plant c. Day neutral plant d. None of the above
Last Answer : Long day short night plant
Description : Flowering in water melon is unaffected by light duration as it is: a. Short day long night plant b. Long day short night plant c. Day neutral plant d. None of the abov
Description : One set of the plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under ... will you place this plant? (a) Long day (b) Darkness neutral (c) Day neutral (d) Short day
Last Answer : (d) Short day
Description : Impotance of day length ( photoperiodism ) in flowering of plants was first shown in
Last Answer : Impotance of day length ( photoperiodism ) in flowering of plants was first shown in A. Cotton B. Petunia C. Lemna D. Tobacco
Description : Most house plants, except cacti, prefer a highly organic and a. Neutral growing medium b. Alkaline growing medium c. Acidic growing medium d. None of above
Last Answer : Acidic growing medium
Description : Plants that flower after reaching a certain stage of development irrespective of the day length are called: (a) Day-neutral plants (b) Long-day-short-day plants (c) Negatively phototrophic plants (d) Long-day plants
Last Answer : Ans:(a)
Description : Critical day length photoperiodism. -Biology
Last Answer : answer:
Description : Which of the following vegetable crop is a relative of cotton: a. Onion b. Okra c. Mustard d. Brinjal
Last Answer : Okra
Description : Bulb production in onion is dependent upon: a. Temperature b. Soil moisture c. Day length d. All of above
Last Answer : Day length
Description : Which of the following statements is not correct? (a) An action potential in an axon does not move backward because the segment behind is in a refractory phase. (b) Depolarisation of hair cells ... d) In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction.
Last Answer : (c) Rods are very sensitive and contribute to daylight vision.
Description : The plants growing in temperate climates are usually: (a) Short-day plants (b) Day neutral plants (c) Long-day plants (d) Long-day-short-day plants
Description : Most of the wheat varieties are (A) Quantitative long day plants (B) Short day plants (C) Day neutral (D) None of these
Last Answer : (B) Short day plants
Description : Gibberellic acid induces flowering (a) in short day plants under long day conditions (b) in day-neutral plants under dark conditions (c) in some gymnospermic plants only (d) in long day plants under short day conditions
Last Answer : (d) in long day plants under short day conditions.
Description : Which of the following plants is known as dessert saroo? a. Populus nigra b. Bahinia varigata c. Sapium seveferum d. Casuarina equistifolia
Last Answer : Casuarina equistifolia
Description : In some plants the buds contain both leaves and flowers and known as a. Leaf buds b. Flower buds c. Scaly buds d. Mixed buds
Last Answer : Mixed buds
Description : Plants, soft and green, and can be easily bent is known a. Herbaceous b. Woody c. Shrubs d. Non of these
Last Answer : Herbaceous
Description : What is photoperiodism in plants? -Biology
Description : Most grass species utilized for turf are characterized by: a. Prostrate creeping b. Fine to medium texture c. Short basal nodes d. All of above
Last Answer : All of above
Description : Choose the correct statement. (a) Nociceptors respond to changes in pressure. (b) Meissner's corpuscles are thermoreceptors. (c) Photoreceptors in the human eye are depolarised during darkness and ... hyperpolarised in response to the light stimulus. (d) Receptors do not produce graded potentials.
Last Answer : (c) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus.
Description : Frond length of cultivated date ranges: a. 3-5 m b. 3-4 m c. 2-3 m d. 1-2 m
Last Answer : 3-4 m
Description : Different mango varieties can be distinguished on the basis of: a. New leaf colour b. Panicle length c. Number of male flowers d. All of above
Last Answer : New leaf colour
Description : Canary date differs from cultivated date in a. Length of fronds b. Arrangement of pinnus c. Thickness of stem d. Area of origin
Last Answer : Thickness of stem
Description : What is the relative length of the discharge time constant with respect to the charge time constant of a damper (long or short)?
Last Answer : Long time constant.
Description : What is the relative length of the time constant for the diode capacitor combination in a damper (long or short)?
Last Answer : Short time constant.
Description : Is there a chart out there that lists the chemical properties of common plants?
Last Answer : http://tinyurl.com/29ys5hb
Description : Should I pinch suckers off my tomato plants even though they've gotten big and now have blossoms on them?
Last Answer : The only disadvantage of suckers is that the more you have, the less the tomatoes will weigh. The more suckers you have, the more tomatoes you will harvest, although they will be smaller. Your choice.
Description : In a landscape design, properly located plants and structures. a. Can reduce heat intensity b. Need to be constantly pruned and maintained c. Block the view of the front door d. Are not essential for a good landscape design
Last Answer : Can reduce heat intensity
Description : Low-growing landscape plants should: a. Be placed in front of intermediate growing plants b. Be placed behind intermediate growing plants c. Not be used in the landscape d. Be planted under large trees
Last Answer : Be placed in front of intermediate growing plants
Description : In plants, __________ is the process of converting stored energy into energy for plant growth. a. Transpiration b. Photosynthesis c. Respiration d. Pollination
Last Answer : Respiration
Description : To make the living area of a landscape appear larger, a designer should include plants that feature: a. Warm-colored flowers such as reds, oranges, yellows b. Cool-colored flowers such as blues, purples, lavenders c. A combination of warm- and cool-colored flowers d. All white flowers
Last Answer : Cool-colored flowers such as blues, purples, lavenders
Description : Plants usually do not grow well in poorly drained soils because: a. Oxygen content is low in poorly drained soils b. The organic matter content of poorly drained soils is too high c. Poorly drained soils warm too quickly in spring d. Plant roots become engorged with water in poorly drained soils
Last Answer : Oxygen content is low in poorly drained soils
Description : Plants that have been clipped or pruned into two-dimensional forms are: a. Espalier b. Topiary c. Balanced d. Dynamic
Last Answer : Espalier
Description : Training plants into three-dimensional ornamental forms, such as animals, is called: a. Topiary b. Espalier c. Heading back d. Bonsai
Last Answer : Topiary
Description : The average humidity percentage recommended for interior plants is: a. 70 to 100% b. 40 to 70% c. 20 to 30% d. 10 to 20%86.
Last Answer : 40 to 70%
Description : Which of the following statements is true? a. Annuals are used as surface material. b. Annuals are used as ground covers. c. Annuals are used as border plants. d. Annuals are used all of above purposes
Last Answer : Annuals are used all of above purposes
Description : The major auxin produced in plants is: a. Indole-3-butyric acid (IBA) b. Naphthalene acetic acid (NAA) c. Indole-3-acetic acid (IAA) d. Ethylene
Last Answer : Indole-3-acetic acid (IAA)
Description : Which of the following statements is true. a. Perennials are used for one season. b. Perennials are good plants for the garden with low maintenance cost. c. Perennials are not easy to grow and establish in beds. d. Perennials are only for foliage beauty
Last Answer : Perennials are good plants for the garden with low maintenance cost.
Description : In temperate climates, pruning should not be done near the end of the summer because: a. New growth will not harden before winter b. It may increase foliage disease c. Plants will not recover in time to produce new growth before winter d. Sever “bleeding” from the cuts will kill the plant
Last Answer : New growth will not harden before winter
Description : Peat is often mixed into the growing medium of container plants because it: a. Is inexpensive b. Has good air and water holding capacities c. Has a high pH d. Absorbs excessive soluble salts
Last Answer : Has good air and water holding capacities
Description : A technique to produce well branched, compact plants with many flowers is: a. Stunting b. Compacting c. Pinching d. Potting
Last Answer : Pinching
Description : All of the following are bulbous and tuberous-rooted plants except: a. Dahlias b. Dutch iris c. Caladiums d. Snapdragons
Last Answer : Snapdragons
Description : Hard, thorny structures which protect the buds of woody plants during winter, are termed as: a. Nodes b. Scales c. Bracts d. None of all
Last Answer : Scales
Description : Which of the following plants require severe pruning? a. Lagerstromea purporea b. Nerium odorum c. Jasminum sambac d. Thuja orientalis
Last Answer : Lagerstromea purporea
Description : Reproductive phase of fruit plants is improved by the accumulation of _____: a. Nitrogen b. Starch c. Proteins d. Cellulose
Last Answer : Starch
Description : More harmones are accumulated in plants due to accumulation of _______: a. Nitrate b. Starch c. Protein d. Vitamins
Description : Addition of __________ hastens the time of fruit bud differentiation in fruit plants: a. Nitrites b. Nitrides c. Nitrates d. All of these
Last Answer : Nitrates
Description : Which of the following plants are used for the extraction of scent? a. Rose b. Murva c. Citrus d. All of above
Last Answer : Citrus
Description : For good pollination in papaya orchard it is necessary that male plants should be a. 5-10% b. 40-45% c. 50-55% d. 70-75%
Last Answer : 5-10%