29 Questions
What is the main cause of stalk rot in plants?
Bacterial enzymes that degrade cell walls
Which of the following is an example of bacterial blight in plants?
Xanthomonas oryzae pv. oryzae - bacterial leaf blight of rice
What is the main characteristic of a virus as described in the text?
It can only multiply intracellularly as an obligate parasite
Which of the following is NOT a typical symptom of viral infection in plants?
Bacterial wilt
What is the defining characteristic of fungi as described in the text?
All of the above
What is the typical virus that infects rice plants?
Tungro virus
What was affirmed in the 1996 Rome Declaration on World Food Security?
That more than 800 million people worldwide lack sufficient food.
Which of the following is NOT mentioned as a reason preventing the fulfilment of essential food needs?
Overpopulation
What is likely to continue or grow significantly unless immediate action is taken?
Hunger and food insecurity problems
What is the relationship between the increase in world population and the stress on natural resources mentioned in the text?
The increase in world population has led to an increase in stress on natural resources.
How has global food production changed in the past 50 years?
It has tripled.
What was the world's population in 2012 according to the text?
7 billion
What is the measure used to quantify light intensity received by plants?
Foot-candles
What is the approximate range of light intensity required for plants to reduce carbon dioxide to carbohydrates?
2.8 to 10 nm
According to the Corona classification, which type of climate has a pronounced dry season lasting for seven months with less than 50mm precipitation?
Type 1
Which of the following statements about plant species and light intensity is true?
Plant species differ in their responses to light intensity.
Which of the following regions experiences a Type 2 climate according to the Corona classification?
Catanduanes and Sorsogon
What percentage of the sun's energy reaches the Earth's surface?
47%
What is the term used to describe the radiation used by plants to fix carbon dioxide during photosynthesis?
Photosynthetically active radiation (PAR)
Which type of climate has no pronounced dry season and relatively even rainfall distribution throughout the year?
Type 4
In which region does the Type 3 climate prevail, according to the Corona classification?
All of the above
What is the term used to describe the effect of light on plant development?
Photocybernetic effect
Which statement is NOT true about the Corona classification of climate types?
It considers temperature variations as the primary factor.
Which region experiences a Type 1 climate?
Western part of Luzon
What does the efficiency in water utilization express?
The competitive ability of the species
What is the water requirement for Portulaca, a succulent weed, to produce 1 g of dry matter?
253 g
What is the effect of adding fertilizer when weeds are present in the crop?
It results in a low yield
What is the effect of removing weeds when fertilizer is added to the crop?
The crop benefits considerably from the added fertilizer
Why do weeds often outgrow the crop in a short period of time?
Weeds have a faster growth rate than the crop
Test your knowledge on the future of cereal crops, production challenges, and problems faced in cereal crops production. Explore key issues related to hunger, malnutrition, and food security highlighted at the World Food Summit.
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