930+ Horticultural Science Solved MCQs

1.

The edible part of potato is:

A. Root
B. Tuber
C. Rhizome
D. Corm
Answer» B. Tuber
2.

Vegetable production for local consumption is:

A. Market gardening
B. Home gardening
C. Truck gardening
D. Vegetable forcing
Answer» A. Market gardening
3.

Most of the summer vegetables are:

A. Annual
B. Biennial
C. Perennial
D. None
Answer» A. Annual
4.

In seed formation the inner integument remains thin and develops into:

A. Testa
B. Tegmen
C. Aril
D. Hilum
Answer» B. Tegmen
5.

During seed formation, a sear left by the funiculus is termed as

A. Hilum
B. Funiculus
C. Operculum
D. Raphe
Answer» A. Hilum
6.

Cracking in tomato fruit is due to:

A. High nitrogen level
B. Temperature fluctuations
C. Soil moisture fluctuations
D. All of these
Answer» D. All of these
7.

Endosperm like tissue (2n) in seed developing from nucellus is :

A. Endospem
B. Cotyledom
C. Perisperm
D. Mericarp
Answer» C. Perisperm
8.

Orthodox seeds after dissemination may be

A. None dormant
B. Dormant
C. Quiescent
D. All of above
Answer» D. All of above
9.

Secondary dormancy in non dormant seeds is due to:

A. Temperature
B. Moisture
C. Aeration
D. Light
Answer» A. Temperature
10.

Germination of undeveloped seeds is favored by:

A. Warm temperature (>20°C)
B. Gibberallic acid
C. Low temperature (<20°C)
D. a & b
Answer» D. a & b
11.

During stratification, the most important factor is:

A. Temperature
B. Duration
C. Media
D. All of above
Answer» D. All of above
12.

Stage at which seed achieves it maximum dry weight and has maximum germination potential and vigor is:

A. Physiological maturity
B. Edible maturity
C. Harvest maturity
D. None of above
Answer» A. Physiological maturity
13.

Seed vigor is affected by

A. Time of storage
B. Type of seed stored
C. Storage environment
D. All of above
Answer» D. All of above
14.

Tetrazolium test to check seed viability is

A. Chemical test
B. Enzyme test
C. Germination test
D. a & c
Answer» D. a & c
15.

Researchers describe seed moisture contents in terms of :

A. Dry weight
B. Wet weight
C. Percent weight
D. a & b
Answer» D. a & b
16.

Controlled inhibition of seed is termed as:

A. Priming
B. Soaking
C. Chilling
D. None of above
Answer» D. None of above
17.

Celery and lettuce at high temperature become

A. Photodormant
B. Thermodormant
C. Ecodormant
D. Non dormant
Answer» B. Thermodormant
18.

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
Answer» C. Decrease in TSS increase in dry matter
19.

Most of following category crops are shallow rooted

A. Summer
B. Winter
C. Off season
D. All of above
Answer» A. Summer
20.

Deep rooted vegetables require:

A. Less frequent irrigation
B. More water at each irrigation
C. Both a & b
D. None of above
Answer» C. Both a & b
21.

Fruit of following vegetables is edible:

A. Summer
B. Winter
C. Cruciferous
D. All of above
Answer» A. Summer
22.

Mulches are mainly used to reduce

A. Transpiration
B. Evaporation
C. Evapotranspiration
D. All of above
Answer» D. All of above
23.

What type of mulches reduce soil temperature?

A. Organic mulch
B. Gray polythene
C. Black polythene
D. Transparent polythene
Answer» A. Organic mulch
24.

For hybrid seed production _______ flowers are completely suppressed on female plants.

A. Staminate
B. Pistillate
C. Staminode
D. Alternate
Answer» A. Staminate
25.

Recommended cucumber cultivars under tunnel production technology are:

A. Monoecious
B. Gynoecious
C. Andromonoecious
D. Gynomonoecious
Answer» B. Gynoecious
26.

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
Answer» B. Long day short night plant
27.

Nature of pollination in cucurbits is:

A. Highly cross pollinated
B. Oftenly cross pollinated
C. Highly self pollinated
D. None of above
Answer» A. Highly cross pollinated
28.

Ginger is commonly cultivated as:

A. Annual
B. Biennial
C. Perennial
D. Biannaul
Answer» A. Annual
29.

Cross pollination is essential in following type of vegetables.

A. Monoecious
B. Dioecious
C. Gynoecious
D. Perigynous
Answer» B. Dioecious
30.

Cross pollination in plants bearing bisexual flowers is due to

A. Dichogamy
B. Herkogamy
C. Heterostyly
D. All of above
Answer» D. All of above
31.

In anemophilous plants, pollens are disseminated by means of:

A. Insects
B. Water
C. Wind
D. Gravity
Answer» A. Insects
32.

In pollen development Gametocides induces a problem of:

A. Sterility
B. Viability
C. Fertility
D. Mobility
Answer» A. Sterility
33.

Production of seeds without fertilization is termed as:

A. Parthenocarpy
B. Parthenogenesis
C. Gametogenesis
D. All of above
Answer» B. Parthenogenesis
34.

Most of the hybrid watermelon and cucumber are:

A. Triproid
B. Diploids
C. Aneuploids
D. Colchiploids
Answer» D. Colchiploids
35.

Removal of off type plants from a seed field is termed as:

A. Weeding
B. Rouging
C. Hoeing
D. All of above
Answer» B. Rouging
36.

The most important seed component affecting seed /viability during storage is:

A. Temperature
B. Humidity
C. Moisture
D. Food reserves
Answer» A. Temperature
37.

Potato is generally propagated through

A. Seed potato
B. Potato seed
C. True Potato Seed
D. All of above
Answer» D. All of above
38.

Isolation during seed production is done by:

A. Types (Varieties)
B. Plantation at a distance
C. Zoning
D. All of above
Answer» B. Plantation at a distance
39.

The most common pollinator insect in Pakistan is

A. Syrphid fly
B. Bumble bees
C. Honey bees
D. House fly
Answer» C. Honey bees
40.

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
Answer» D. All of above
41.

Male sterily is not due to

A. Genetic factor
B. Genome factor
C. Cytogenetic factor
D. Nutritional factor
Answer» D. Nutritional factor
42.

Hybrid vigor in vegetables is manifested by

A. High yield
B. Uniformity in size
C. Uniformity in maturity
D. All of above
Answer» D. All of above
43.

Water melon for seed should be harvested when

A. Tendrils wither
B. Skin color is green
C. Skin color is pale yellow
D. Vine dry out
Answer» A. Tendrils wither
44.

In Pakistan, vegetables for seed production are harvested by:

A. Manual method
B. Machines
C. Combine harvestors
D. All of above
Answer» A. Manual method
45.

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
Answer» A. Less than 10%
46.

The poorest seed storage capacity is in:

A. Okra
B. Peas
C. Cucurbits
D. Onion
Answer» D. Onion
47.

Nitrates are absorbed at pH below ___________:

A. 5
B. 6
C. 7
D. 8
Answer» A. 5
48.

Hormones which control apical dominance are:

A. Auxins
B. Cytokinins
C. Gibberellins
D. Polyamines
Answer» A. Auxins
49.

Tetraploid watermelon must be pollinated by ____ plants to produce a seedless watermelon

A. Triploid
B. Aneuploid
C. Diploid
D. Tetraploid
Answer» C. Diploid
50.

Which vegetable cannot be grown as an off season vegetable:

A. Tomato
B. Potato
C. Chillies
D. Cucumber
Answer» B. Potato
51.

Lower temperature than normal convert male flowers into perfect flowers in ________:

A. Date palm
B. Mango
C. Papaya
D. Citrus
Answer» C. Papaya
52.

Tomato is a _________ crop.

A. Self pollinated
B. Insect pollinated
C. Oftenly cross pollinated
D. Wind pollinated
Answer» A. Self pollinated
53.

Turmeric is propagated by:

A. Corms
B. Seed
C. Rhizome
D. Bulb
Answer» C. Rhizome
54.

Sweet potato is propagated by:

A. Stem cuttings
B. Tubers
C. Roots
D. a & b
Answer» D. a & b
55.

Self pollination is a form of:

A. Inbreeding
B. Out breeding
C. Random mating
D. None of these
Answer» A. Inbreeding
56.

Cross pollination is associated with:

A. Cleistogamy
B. Chasmogamy
C. Dichogamy
D. Apogamy
Answer» B. Chasmogamy
57.

Completion of pollination and fertilization in unopened flower bud is termed as

A. Chasmogamy
B. Apogamy
C. Cleistogamy
D. Dichogamy
Answer» C. Cleistogamy
58.

Maturation of anthers and stigma at the same time refers to:

A. Homogamy
B. Chasmogamy
C. Cleistogamy
D. Dichogamy
Answer» A. Homogamy
59.

Fertilization after opining of flower refers to:

A. Cleistogamy
B. Chasmogamy
C. Homogamy
D. Herkogamy
Answer» B. Chasmogamy
60.

Male sterility promotes:

A. Autogamy
B. Allogamy
C. Homogamy
D. Chasmogamy
Answer» D. Chasmogamy
61.

Exposure of seed to low temperature before germination is termed as :

A. Scarification
B. Stratification
C. Vernalization
D. All of above
Answer» B. Stratification
62.

Imbibed or germinated seeds subjected to cold temperature is termed as:

A. Scarification
B. Startification
C. Vernalization
D. Sterilization
Answer» C. Vernalization
63.

Which of following vegetable does not require specific low temperature before flowering:

A. Beetroot
B. Cabbage
C. Onion
D. Brinjal
Answer» D. Brinjal
64.

Edible part of cauliflower is :

A. Flowers
B. Flower bud
C. Vegetative bud
D. Inflorescence
Answer» C. Vegetative bud
65.

Edible portion of cabbage is

A. Terminal bud
B. Leaves
C. Leaves + inflorescence
D. All of above
Answer» B. Leaves
66.

Cole crops are:

A. Hardy
B. Half hardy
C. Non hardy
D. Semi hardy
Answer» A. Hardy
67.

The commercial variety of watermelon is:

A. Sugar baby
B. Red beauty
C. Red king
D. Sugary
Answer» A. Sugar baby
68.

Vine of crop of bottle gourd is not staked during:

A. Summer season
B. Rainy season
C. Early season
D. Late season
Answer» A. Summer season
69.

Which one is not the best source of protein?

A. Potatoes
B. Peas
C. Beans
D. Okra
Answer» A. Potatoes
70.

The cause of hotness in Chillies is:

A. Cucurbitacin
B. Capsaicin
C. Allicin
D. All of above
Answer» B. Capsaicin
71.

Which crop is most susceptible to viral infection :

A. Chilies
B. Tomato
C. Onion
D. Brinjal
Answer» B. Tomato
72.

Which of the following vegetable has a dioecious behaviour:

A. Onion
B. Cabbage
C. Bitter gourd
D. Spinach
Answer» C. Bitter gourd
73.

Consecutive use of garlic will reduce the level of:

A. Cholesterol
B. Sugar
C. Uric acid
D. None of above
Answer» A. Cholesterol
74.

Bulb production in onion is dependent upon:

A. Temperature
B. Soil moisture
C. Day length
D. All of above
Answer» C. Day length
75.

Red colour of carrot is due to :

A. Lycopene
B. Carotene
C. Anthocyanin
D. Propanene
Answer» B. Carotene
76.

Colour of carrot roots is affected by:

A. Soil temperature
B. Soil moisture
C. Soil texture
D. All of above
Answer» B. Soil moisture
77.

Radish belongs to family:

A. Cruciferae
B. Umbelliferae
C. Leguminoseae
D. Poaceae
Answer» B. Umbelliferae
78.

The portion of axis below the cotyledons in seed is:

A. Micropyl
B. Hypocotyl
C. Epicotyl
D. None of above
Answer» B. Hypocotyl
79.

In spinach, pollination takes place by means of:

A. Water
B. Insects
C. Birds
D. Wind
Answer» D. Wind
80.

Tender crop cannot tolerate a minimum temperature of

A. -2°C
B. -1°C
C. 0°C
D. All of above
Answer» D. All of above
81.

Optimum temperature for cool season vegetables is:

A. 25-30°C
B. 25-27°C
C. 18-24°C
D. 15-20°C
Answer» C. 18-24°C
82.

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
Answer» A. Avoidance
83.

Tomato, chillies and brinjal are grouped as

A. Cole crops
B. Fruit crops
C. Solanaceous crops
D. Summer crops
Answer» C. Solanaceous crops
84.

Color development in tomato fruit is due to

A. Lycopene
B. Carotenoid
C. Polypropylene
D. All of above
Answer» A. Lycopene
85.

Cucurbits consumed at immature stage are grouped under:

A. Summer squashes
B. Winter squashes
C. Gourds
D. Pumpkins
Answer» C. Gourds
86.

Almost all vegetables are dioeceous with respect to flower.

A. Summer
B. Winter
C. Both of these
D. None of these
Answer» D. None of these
87.

Term vine yard is used for:

A. Grape plantation
B. Citrus plantation
C. Mango plantation
D. None of these
Answer» A. Grape plantation
88.

Term viticulture is used for:

A. Grape cultivation
B. Citrus cultivation
C. Mango cultivation
D. None of these
Answer» A. Grape cultivation
89.

Home gardening deals with vegetable production for:

A. Home consumption
B. For local market
C. At commercial level
D. All of these
Answer» A. Home consumption
90.

Truck gardening means vegetable production for:

A. Distant places
B. Industry
C. Local market
D. None of these
Answer» A. Distant places
91.

Tip burn of lettuce occurs at high air temperature when the soil is _______:

A. Cool
B. Dry
C. Hot
D. Wet
Answer» B. Dry
92.

Organic crop cultivation is :

A. With fertilizers
B. Without fertilizers
C. With organic manures
D. None of these
Answer» B. Without fertilizers
93.

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
Answer» A. Plant x Plant distance
94.

Transplanting means

A. Shifting of seedlings
B. Shifting of large plants
C. Shifting of potted plants
D. All of these
Answer» A. Shifting of seedlings
95.

Shrubs fall in the category of

A. 7-15 feet high
B. 25 feet high
C. More than 25 feet
D. None of these
Answer» A. 7-15 feet high
96.

Deciduous plants are mostly grown in

A. Hilly area
B. In plains
C. Along rivers
D. None of these
Answer» A. Hilly area
97.

Vine mean climbing/trailing plants with

A. Herbaceous stem
B. Woody stem
C. Both of these
D. None of these
Answer» A. Herbaceous stem
98.

Monoecious plants have male and female sexes/flowers on

A. Same plant
B. Different plants
C. Both of these
D. None of these
Answer» A. Same plant
99.

Hardy crops /plants are acclimatized against

A. Frost
B. Extreme heat
C. Both of these
D. None of these
Answer» C. Both of these
100.

True fruits developed from

A. Ovary
B. Thalamus
C. Pericarp
D. All of these
Answer» A. Ovary
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