Agriculture Exams (Agri Cropsci) – Page 5

#81. Plant hormone that is most abundant in the growing points:
A auxin
B gibberelin
C ethylene
D cytokinin
Answer: ethylene
#82. The response of a plant by growing towards the direction of light is called;
A phototropism
B geotropism
C epinasty
D thigmotropism
Answer: thigmotropism
#83. The effect of sunlight on plant development is referred to as;
A plant response to day length
B photocybernetic effect
C photosynthesis
D response to gravity
Answer: photosynthesis
#84. The products of light reaction phase of photosynthesis are;
A CH2O and NADPH
B ATP and NADPH
C ATP and NADH
D O2 and ATP
Answer: ATP and NADPH
#85. Plant responses to seasonal variation in daylength is known as:
A photoperiodism
B vernalization
C circadian rhythm
D morphogenesis
Answer: photoperiodism
#86. The photoreceptor involved in photoperiodism:
A chlorophyll
B flavins
C phytochrome
D carotenoids
Answer: phytochrome
#87. The amount of green pigments is reduced resulting to yellowing of leaves:
A N deficiency
B chlorosis
C necrosis
D dialysis
Answer: chlorosis
#88. What particular growth hormone influence the growth response of plants to unidirectional light or phototropism?
A abscissic acid (ABA)
B alpha naphthalene acetic acid (ANAA)
C gibberelic acid (GA)
D indole acetic acid (IAA)
Answer: indole acetic acid (IAA)
#89. Growth hormone that promotes the senescence of leaves;
A auxin
B cytokinin
C abscissic acid
D gibberellins
Answer: abscissic acid
#90. A type of dormancy in seeds equivalent to quiescence;
A Chemical dormancy
B ecodormancy
C endodormancy
D paradormancy
Answer: ecodormancy
#91. As an essential element, nitrogen is taken up by crops in the following forms:
A NH4+ and NO2
B N2, NO2- and NH4+
C NO3- and NH4+
D N2O, NO3 and NO2
Answer: NO3- and NH4+
#92. Growth response of plants that is best exemplified by the closing of Mimusa leaves:
A thermotropism
B seismonasty
C thigmomorphogenesis
D thigmotropism
Answer: thigmotropism
#93. Growth center of plants:
A stems
B shoots
C meristem
D branch
Answer: meristem
#94. At present the three major crops of the Philippines in terms of land area cultivated:
A abaca, rice and coconut
B rice corn and coconut
C banana, sugarcane and coffee
D corn, abaca and banana
Answer: rice corn and coconut
#95. The agency involved in approving the release of recommended varieties of crops in the Philippines.
A National Seed Industry Council
B International Rice Research Institute
C Philippine Seedboard
D Institute of Plant Breeding
Answer: National Seed Industry Council
#96. Which statement is not a control strategy against white and yellow stemborers.
A Flooding and using ropes dipped in kerosene.
B Synchronous planting after a fallow period, using resistant varieties.
C Conserve natural enemies; like wasps, spiders, earwigs
D Plant establishment should coincide when stemborer population is at lowest.
Answer: Flooding and using ropes dipped in kerosene.
#97. This macroelement is a component of protein and chlorophyll and is most limiting element in crop production except for legumes.
A Calcium
B Potassium
C Nitrogen
D Phosphorus
Answer: Nitrogen
#98. The ability of the soil to replenish the amount of nutrients in the soil solution
A Availability
B Intensity factor
C Capacity factor
D Buffering capacity
Answer: Capacity factor
#99. The botanical classification of agricultural crops is the grouping according to morphological similarities and it was founded by this scientist.
A Pastuer
B Leuwenhooke
C Linnaues
D Hooke
Answer: Linnaues
#100. Who was the Secretary of Agriculture when the Bureau of Agricultural Extension was established in 1953 together with the 4-H club and rural improvement club?
A Fernando Lopez
B Salvador Araneta
C Placido Mapa
D Rafael Alunan Sr.
Answer: Fernando Lopez