Agriculture MCQsPreparation for Agriculture Officer
Agri-MCQs # 17: Horticultural Sciences
Last updated on October 17th, 2024 at 01:21 am
Check out the most important MCQs on Horticultural Sciences here.
Institute of Horticultural Sciences
Multiple Choice Questions for Entry Test
-
The edible part of potato is:
a. Root
b. Tuber
c. Rhizome
d. Corm -
Vegetable production for local consumption is:
a. Market gardening
b. Home gardening
c. Truck gardening
d. Vegetable forcing -
Foliage plants with extremely tender and watery stem are:
a. Herb
b. Succulents
c. Vine
d. Runner -
Most of the summer vegetables are:
a. Annual
b. Biennial
c. Perennial
d. None -
Summer vegetables can be grown out of season in a climatic region:
a. Lower Sindh
b. Upper Sindh
c. Southern Punjab
d. Northern Punjab -
In seed formation, the inner integument remains thin and develops into:
a. Testa
b. Tegmen
c. Aril
d. Hilum -
During seed formation, a scar left by the funiculus is termed as:
a. Hilum
b. Funiculus
c. Operculum
d. Raphe -
Cracking in tomato fruit is due to:
a. High nitrogen level
b. Temperature fluctuations
c. Soil moisture fluctuations
d. All of these -
Endosperm-like tissue (2n) in seed developing from nucellus is:
a. Endosperm
b. Cotyledon
c. Perisperm
d. Mericarp -
Orthodox seeds after dissemination may be:
a. None dormant
b. Dormant
c. Quiescent
d. All of above -
Reduction or elimination of dormancy in crop plant is due to:
a. Domestication
b. Hybridization
c. Mutation
d. Acclimatization -
Dormancy due to factors within the embryo is:
a. Endogenous
b. Exogenous
c. Combination
d. None of above -
Secondary dormancy in non-dormant seeds is due to:
a. Temperature
b. Moisture
c. Aeration
d. Light -
Germination of undeveloped seeds is favored by:
a. Warm temperature (>20°C)
b. Gibberellic acid
c. Low temperature (<20°C)
d. a & b
-
During stratification, the most important factor is:
a. Temperature
b. Duration
c. Media
d. All of above -
Stage at which seed achieves its maximum dry weight and has maximum germination potential and vigor is:
a. Physiological maturity
b. Edible maturity
c. Harvest maturity
d. None of above -
Seed vigor is affected by:
a. Time of storage
b. Type of seed stored
c. Storage environment
d. All of above -
Tetrazolium test to check seed viability is:
a. Chemical test
b. Enzyme test
c. Germination test
d. a & c -
Researchers describe seed moisture contents in terms of:
a. Dry weight
b. Wet weight
c. Percent weight
d. a & b -
Controlled imbibition of seed is termed as:
a. Priming
b. Soaking
c. Chilling
d. None of above -
Celery and lettuce at high temperature become:
a. Photodormant
b. Thermodormant
c. Ecodormant
d. Non-dormant -
Excessive soil moisture, late in the season cause:
a. Decrease in TSS, decrease in dry matter
b. Increase in TSS, decrease in dry matter
c. Decrease in TSS, increase in dry matter
d. None of above -
Most of the following category crops are shallow-rooted:
a. Summer
b. Winter
c. Off-season
d. All of above -
Deep-rooted vegetables require:
a. Less frequent irrigation
b. More water at each irrigation
c. Both a & b
d. None of above -
The fruit of following vegetables is edible:
a. Summer
b. Winter
c. Cruciferous
d. All of above -
Mulches are mainly used to reduce:
a. Transpiration
b. Evaporation
c. Evapotranspiration
d. All of above -
What type of mulches reduce soil temperature?
a. Organic mulch
b. Gray polythene
c. Black polythene
d. Transparent polythene -
For hybrid seed production, _______ flowers are completely suppressed on female plants:
a. Staminate
b. Pistillate
c. Staminode
d. Alternate -
Recommended cucumber cultivars under tunnel production technology are:
b. Gynoecious
a. Monoecious
c. Andromonoecious
d. Gynomonoecious -
Flowering in watermelon 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 -
Nature of pollination in cucurbits is:
a. Highly cross pollinated
b. Oftenly cross pollinated
c. Highly self pollinated
d. None of above
-
Ginger is commonly cultivated as:
a. Annual
b. Biennial
c. Perennial
d. Biannual -
Cross pollination is essential in the following type of vegetables:
a. Monoecious
b. Dioecious
c. Gynoecious
d. Perigynous -
Cross-pollination in plants bearing bisexual flowers is due to:
a. Dichogamy
b. Herkogamy
c. Heterostyly
d. All of above -
In anemophilous plants, pollens are disseminated by means of:
a. Insects
b. Water
c. Wind
d. Gravity -
In pollen development, gametocides induce a problem of:
a. Sterility
b. Viability
c. Fertility
d. Mobility -
Production of seeds without fertilization is termed as:
a. Parthenocarpy
b. Parthenogenesis
c. Gametogenesis
d. All of above -
Most of the hybrid watermelon and cucumber are:
a. Triploid
b. Diploids
c. Aneuploids
d. Colchiploids -
Removal of off-type plants from a seed field is termed as:
a. Weeding
b. Rouging
c. Hoeing
d. All of above -
The most important seed component affecting seed viability during storage is:
a. Temperature
b. Humidity
c. Moisture
d. Food reserves -
Potato is generally propagated through:
a. Seed potato
b. Potato seed
c. True Potato Seed
d. All of above -
Isolation during seed production is done by:
a. Types (Varieties)
b. Plantation at a distance
c. Zoning
d. All of above -
The most common pollinator insect in Pakistan is:
c. Honey bees
a. Syrphid fly
b. Bumble bees
d. House fly -
Seed production in biennial vegetables is mostly done by:
a. Seed to seed method
b. In situ method
c. Replanting method
d. All of above -
Male sterility is not due to:
a. Genetic factor
b. Genome factor
c. Cytogenetic factor
d. Nutritional factor -
Hybrid vigor in vegetables is manifested by:
a. High yield
b. Uniformity in size
c. Uniformity in maturity
d. All of above -
Watermelon for seed should be harvested when:
a. Tendrils wither
b. Skin color is green
c. Skin color is pale yellow
d. Vine dry out -
In Pakistan, vegetables for seed production are harvested by:
a. Manual method
b. Machines
c. Combine harvesters
d. All of above -
During storage of vegetable seeds, seed moisture should be:
a. Less than 10%
b. Equal to 10%
c. Greater than 10%
d. None of above -
The poorest seed storage capacity is in:
d. Onion
a. Okra
b. Peas
c. Cucurbits
-
Nitrates are absorbed at pH below:
a. 5
b. 6
c. 7
d. 8 -
Hormones which control apical dominance are:
a. Auxins
b. Cytokinins
c. Gibberellins
d. Polyamines -
Tetraploid watermelon must be pollinated by ____ plants to produce a seedless watermelon:
c. Diploid
a. Triploid
b. Aneuploid
d. Tetraploid -
Which vegetable cannot be grown as an off-season vegetable:
a. Tomato
b. Potato
c. Chillies
d. Cucumber -
Lower temperature than normal converts male flowers into perfect flowers in:
a. Date palm
b. Mango
c. Papaya
d. Citrus -
Tomato is a _________ crop:
a. Self-pollinated
b. Insect-pollinated
c. Often cross-pollinated
d. Wind-pollinated -
Turmeric is propagated by:
a. Corms
b. Seed
c. Rhizome
d. Bulb -
Sweet potato is propagated by:
a. Stem cuttings
b. Tubers
c. Roots
d. a & b -
Self-pollination is a form of:
a. Inbreeding
b. Outbreeding
c. Random mating
d. None of these -
Cross-pollination is associated with:
a. Cleistogamy
b. Chasmogamy
c. Dichogamy
d. Apogamy -
Completion of pollination and fertilization in unopened flower bud is termed as:
f. Cleistogamy
a. Chasmogamy
b. Homogamy
c. Dichogamy -
Maturation of anthers and stigma at the same time refers to:
g. Homogamy
a. Chasmogamy
b. Cleistogamy
c. Dichogamy -
Fertilization after opening of flower refers to:
a. Cleistogamy
h. Chasmogamy
b. Homogamy
c. Herkogamy -
Male sterility promotes:
a. Autogamy
b. Allogamy
c. Homogamy
d. Chasmogamy -
Exposure of seed to low temperature before germination is termed as:
a. Scarification
b. Stratification
c. Vernalization
d. All of above -
Imbibed or germinated seeds subjected to cold temperature is termed as:
a. Scarification
k. Vernalization
b. Stratification
c. Sterilization -
Which of following vegetable does not require specific low temperature before flowering:
a. Beetroot
b. Cabbage
c. Onion
d. Brinjal -
Edible part of cauliflower is:
a. Flowers
b. Flower bud
c. Inflorescence
d. Vegetative bud -
Edible portion of cabbage is:
n. Leaves
a. Terminal bud
b. Leaves + inflorescence
c. All of above -
Cole crops are:
o. Hardy
a. Half hardy
b. Non-hardy
c. Semi-hardy -
Which of the following crop has lowest water contents:
a. Cucumber
b. Watermelon
c. Bottle gourd
d. Cauliflower -
The commercial variety of watermelon is:
q. Sugar baby
a. Red beauty
b. Red king
c. Sugary -
Vine of crop of bottle gourd is not staked during:
r. Summer season
a. Rainy season
b. Early season
c. Late season -
Which one is not the best source of protein?
s. Potatoes
a. Peas
b. Beans
c. Okra -
The cause of hotness in chillies is:
a. Cucurbitacin
t. Capsaicin
b. Allicin
c. All of above -
Which crop is most susceptible to viral infection:
u. Tomato
a. Chillies
b. Onion
c. Brinjal -
Which of the following vegetable has a dioecious behavior:
a. Onion
b. Cabbage
c. Bitter gourd
d. Spinach -
Consecutive use of garlic will reduce the level of:
w. Cholesterol
a. Sugar
b. Uric acid
c. None of above -
Bulb production in onion is dependent upon:
a. Temperature
b. Soil moisture
c. Day length
d. All of above -
Red color of carrot is due to:
a. Lycopene
b. Carotene
c. Anthocyanin
d. Propanene -
Color of carrot roots is affected by:
a. Soil temperature
b. Soil moisture
c. Soil texture
d. All of above -
Radish belongs to family:
aa. Cruciferae
a. Umbelliferae
b. Leguminosae
c. Poaceae -
For an early harvest, cucurbits are grown on:
a. Rocky soils
b. Sandy soils
c. Clayey soils
d. Organic soils -
Tomato fruit is botanically a:
a. Berry
b. Pome
c. Drupe
d. Hip
-
Degeneration of above ground parts in ginger is due to:
a. Senescence
b. Maturity
c. Partial senescence
d. Over ripening -
In spinach, pollination takes place by means of:
a. Water
b. Insects
c. Birds
d. Wind -
Tender crop cannot tolerate a minimum temperature of:
a. -2°C
b. -1°C
c. 0°C
d. All of above -
Optimum temperature for cool season vegetables is:
a. 25-30°C
b. 25-27°C
c. 18-24°C
d. 15-20°C -
Which one is not an appropriate approach to control frost?
a. Avoidance
b. Reduction of heat loss
c. Addition of heat
d. Transmittance of control -
Tomato, chillies and brinjal are grouped as:
a. Cole crops
b. Fruit crops
c. Solanaceous crops
d. Summer crops -
Color development in tomato fruit is due to:
a. Lycopene
b. Carotenoid
c. Polypropylene
d. All of above -
Cucurbits consumed at immature stage are grouped under:
a. Summer squashes
b. Winter squashes
c. Gourds
d. Pumpkins -
Almost all vegetables are dioecious with respect to flower:
a. Summer
b. Winter
c. Both of these
d. None of these -
Term vineyard is used for:
a. Grape plantation
b. Citrus plantation
c. Mango plantation
d. None of these -
Term viticulture is used for:
a. Grape cultivation
b. Citrus cultivation
c. Mango cultivation
d. None of these -
Home gardening deals with vegetable production for:
a. Home consumption
b. For local market
c. At commercial level
d. All of these -
Truck gardening means vegetable production for:
a. Distant places
b. Industry
c. Local market
d. None of these -
Tip burn of lettuce occurs at high air temperature when the soil is:
a. Cool
b. Dry
c. Hot
d. Wet -
Organic crop cultivation is:
a. With fertilizers
b. Without fertilizers
c. With organic manures
d. None of these -
Thinning in vegetables is practiced to maintain:
a. Plant x Plant distance
b. Line x Line distance
c. Both of these
d. None of these -
Transplanting means:
a. Shifting of seedlings
b. Shifting of large plants
c. Shifting of potted plants
d. All of these -
Shrubs fall in the category of:
a. 7-15 feet high
b. 25 feet high
c. More than 25 feet
d. None of these -
Deciduous plants are mostly grown in:
a. Hilly area
b. In plains
c. Along rivers
d. None of these -
Vine means climbing/trailing plants with:
a. Herbaceous stem
b. Woody stem
c. Both of these
d. None of these -
Monoecious plants have male and female sexes/flowers on:
a. Same plant
b. Different plants
c. Both of these
d. None of these -
Hardy crops/plants are acclimatized against:
a. Frost
b. Extreme heat
c. Both of these
d. None of these -
True fruits develop from:
a. Ovary
b. Thalamus
c. Pericarp
d. All of these -
Drupe fruits have all the three ovarian layers:
a. Fused
b. Separated
c. Mixed
d. None of these -
Creeping vegetable crops are grown on:
a. Beds
b. Ridges
c. Flats
d. All of these -
Mango is a:
e. Drupe fruit
a. Pome fruit
b. Berry fruit
c. Aggregate fruit -
Citrus is a special type of:
f. Berry
a. Pome
b. Drupe
c. None of these -
Dicots can be identified on the basis of:
g. Reticulate leaf venations
a. Parallel venations
b. No leaf venations
c. None of these -
In binomial nomenclature system, the 1st name is:
h. Genus name
a. Species name
b. Family name
c. Sub-family name -
Most of the summer vegetables belong to family:
i. Cucurbitaceae
a. Solanaceae
b. Malvaceae
c. Poaceae -
Cultivar means:
j. Some cultivated variety
a. Discarded variety
b. Rejected variety
c. Approved variety -
Pears and beans are a rich source of:
k. Protein
a. Carbohydrates
b. Both
c. None of these -
Potato and sweet potato are well-known for:
l. Carbohydrates
a. Proteins
b. Vitamins
c. All of these -
Leafy vegetables provide:
m. Iron
a. Carbohydrates
b. Protein
c. None of these -
Iron is a carrier of:
n. Oxygen
a. CO2
b. Both of these
c. None of these -
Vitamin A is effective against:
o. Night blindness
a. Beriberi disease
b. Gum problems
c. None of these -
Carrot is a rich source of vitamin:
p. Vitamin A
a. Vitamin C
b. Vitamin D
c. Vitamin E -
Cole crops are comprised of:
q. All of these
a. Cauliflower
b. Cabbage
c. Knol Khol -
Salad crops are:
r. All of these
a. Lettuce
b. Radish
c. Cabbage -
Which of the following crop is grown sexually?
s. Onion
a. Potato
b. Garlic
c. Turmeric -
Tomato varieties are mainly:
t. Both types
a. Indeterminate type
b. Determinate type
c. None of these -
Fertigation refers to the application of fertilizer with:
u. Water
a. Rain
b. Both of these
c. None of these -
In hydroponic systems, plants are grown in:
v. Water
a. Soil
b. Sand
c. Gravels -
Through drip, we can provide:
a. Water
b. Fertilizer
w. Both of the above
c. None of these -
Nitrogen in vegetables is needed for:
x. Vegetative growth
a. Ripening/maturity
b. Reproductive growth
c. None of these -
Seed potato seed has:
y. Dormancy
a. Rest period
b. Both of these
c. None of these -
Carrot and coriander belong to the family:
z. Umbelliferae
a. Cruciferae
b. Cucurbitaceae
c. None of these
-
Potato belongs to the family:
aa. Solanaceae
a. Umbelliferae
b. Cruciferae
c. None of these -
Melons belong to the family:
a. Cucurbitaceae
b. Solanaceae
c. Cruciferae
d. None of these -
Melons have seeds in:
a. Cavity/centre
b. Scattered
c. Both types may be
d. None of these -
Cantaloupe belongs to the group:
a. Cucurbits
f. Melons
b. Gourds
c. Squashes -
Hybrid varieties of cucumber grown in tunnels are:
g. Parthenocarpic
a. Zygotic
b. Both types
c. None of these -
Staking of vines in the rainy season is done to avoid:
a. Insect attack
h. Disease attack
b. Sunscald
c. None of these -
Optimum temperature for potato tuber formation is:
i. 20-22°C
a. 25-30°C
b. 22-25°C
c. All of these -
Tuber initiation in potato starts after:
j. 7th week
a. 9th week
b. 5th week
c. 4th week -
Color of carrot depends upon:
k. All of these
a. Age
b. Variety
c. Season -
Splitting of carrot is due to:
a. Fresh manure
l. Heavy fertilizer
b. Less fertilizer
c. None of these -
High temperature in chillies causes:
a. Flower drop
b. Fruit drop
m. Both of the above
c. None of these -
Early blight and late blight of potato are:
a. Viral disease
n. Fungal disease
b. Bacterial disease
c. Disorders -
Potato dormancy can be broken through:
o. Both of these
a. Chemical treatment
b. Low temperature
c. None of these -
Dormancy period in potato is about:
p. 3 Months
a. 2 Months
b. 1 Month
c. ½ Month -
Seed rate/acre in potato for autumn crop is:
q. 900-1100 Kg
a. 500 Kg
b. 400 Kg
c. 100 Kg -
Potato cut tuber are used for planting during:
a. Autumn crop
r. Spring crop
b. Both of the above
c. None of above -
Hollow heart of potato is a:
a. Disease
s. Disorder
b. Insect attack
c. Deficiency -
Potato tubers become green if:
t. Exposed to light
a. Attacked by insect
b. Infected
c. None of these -
Virus-free seeds of potato are produced in:
u. Hilly areas
a. Spring crop
b. In plains
c. Autumn crop -
Okra belongs to family:
v. Malvaceae
a. Solanaceae
b. Cucurbitaceae
c. Chenopodiaceae -
Desiree and Cardinal are varieties of:
a. Carrot
w. Potato
b. Radish
c. Peas -
Which of the following vegetable is directly seeded in field:
a. Chillies
b. Tomato
c. Brinjal
x. Peas -
Buttoning is a disorder of:
y. Cauliflower
a. Peas
b. Potato
c. Tomato -
Production of very small-sized heads in cauliflower is called:
z. Buttoning
a. Belting
b. Both of these
c. None of these -
Development of seed stalks earlier in biennial crops is called:
a. Bolting
b. Buttoning
c. Greening
d. None of these -
Bolting in biennial crops is due to:
e. Low temperature exposure
a. High temperature exposure
b. Both of these
c. None of these -
Quality seed carrot is produced through:
a. Seed to seed method
b. Topping in situ method
c. Steeklings
d. None of these -
Blossom end rot of tomato is due to:
a. Infection/disease
g. Boron/Ca. deficiency
b. Insect attack
c. Nutritional deficiency -
Vegetables belonging to the cross-pollinated group is:
a. Peas
b. Tomato
c. a & b
h. Cabbage -
White brinjals are commonly grown for:
i. Ornamental purpose
a. Salad purpose
b. a + b
c. None of these -
Tunnels for vegetable farming are categorized as:
j. Both types
a. Permanent tunnels
b. Movable tunnels
c. None of these -
Potato can be stored at:
k. 3-4°C
a. 5-10°C
b. 2-3°C
c. 10-15°C -
Pollution in vegetables is caused by:
l. Chemical fertilizers
a. Insecticides
b. Fungi
c. None of these
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