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249 questions found · practise this subject as a set Show 20 · 50 per page

#	Question	Subject and topic	Difficulty
1	Which instrument records the number of hours of bright sunshine in a day?	Agriculture Elements of weather	Easy
2	Wind speed at a weather observatory is usually measured with a:	Agriculture Elements of weather	Easy
3	Relative humidity is defined as:	Agriculture Elements of weather	Medium
4	The temperature at which a crop grows fastest is called its:	Agriculture Elements of weather	Easy
5	A long spell of high relative humidity during crop growth most often leads to:	Agriculture Elements of weather	Medium
6	Climate of a place is best described as:	Agriculture Elements of weather	Hard
7	A forecast valid for the next 3 to 10 days is called a:	Agriculture Weather forecasting	Easy
8	A prediction of total rainfall for the coming monsoon season is an example of a:	Agriculture Weather forecasting	Easy
9	Heavy rain is forecast for tomorrow. The best advice for a farmer planning to spray insecticide is to:	Agriculture Weather forecasting	Medium
10	Warnings of a thunderstorm expected within the next two or three hours are given through:	Agriculture Weather forecasting	Medium
11	Which forecast range is generally most useful for planning farm operations such as sowing and fertiliser appl…	Agriculture Weather forecasting	Hard
12	Which agricultural activity is a major source of methane?	Agriculture Climate change and crop production	Easy
13	Nitrous oxide emissions from farms come mainly from:	Agriculture Climate change and crop production	Medium
14	Under elevated CO₂, which crop is likely to show the greatest increase in photosynthesis?	Agriculture Climate change and crop production	Hard
15	Rising temperature during grain filling usually affects wheat by:	Agriculture Climate change and crop production	Medium
16	Köppen's classification of climate is based on:	Agriculture Climate change and crop production	Easy
17	The south-west monsoon usually first reaches the Indian mainland over:	Agriculture Monsoon in India	Easy
18	Which state receives a large share of its annual rainfall from the north-east monsoon?	Agriculture Monsoon in India	Easy
19	Winter rainfall from western disturbances is most helpful to which crop in north-west India?	Agriculture Monsoon in India	Medium
20	A dry spell of several days in the middle of the rainy season is called a:	Agriculture Monsoon in India	Medium
21	El Niño conditions in the Pacific Ocean are commonly associated with:	Agriculture Monsoon in India	Hard
22	The word monsoon is derived from an Arabic word meaning:	Agriculture Monsoon in India	Easy
23	Crossing over between homologous chromosomes takes place during:	Agriculture Cell structure and cell division	Easy
24	Maize has 2n = 20. How many chromosomes are present in each of its egg cells?	Agriculture Cell structure and cell division	Medium
25	Mitosis in a diploid cell produces:	Agriculture Cell structure and cell division	Easy
26	Which structure is present in a plant cell but absent in an animal cell?	Agriculture Cell structure and cell division	Easy
27	The replication of DNA in the cell cycle occurs during:	Agriculture Cell structure and cell division	Medium
28	Meiosis is called reductional division because it:	Agriculture Cell structure and cell division	Hard
29	In a DNA molecule, 20% of the bases are cytosine. What percentage are adenine?	Agriculture Genetic material	Medium
30	Which base is found in RNA but not in DNA?	Agriculture Genetic material	Easy
31	The double helix model of DNA was proposed by:	Agriculture Genetic material	Easy
32	Guanine and cytosine in DNA are held together by:	Agriculture Genetic material	Medium
33	The basic unit of chromatin, made of DNA wrapped around histone proteins, is the:	Agriculture Genetic material	Hard
34	The genetic material of tobacco mosaic virus is:	Agriculture Genetic material	Medium
35	The genotypic ratio in the F₂ of a monohybrid cross is:	Agriculture Mendel’s laws of inheritance	Easy
36	How many different genotypes appear in the F₂ of a cross involving three independently assorting heterozygous…	Agriculture Mendel’s laws of inheritance	Hard
37	A tall pea plant crossed with a dwarf plant gives 50% tall and 50% dwarf offspring. The tall parent was:	Agriculture Mendel’s laws of inheritance	Medium
38	The law that states that the two factors of a pair separate during gamete formation is the law of:	Agriculture Mendel’s laws of inheritance	Easy
39	Mendel observed independent assortment for the characters he analysed mainly because:	Agriculture Mendel’s laws of inheritance	Medium
40	The phenotypic ratio of a dihybrid test cross (F₁ × double recessive) is:	Agriculture Mendel’s laws of inheritance	Medium
41	Grain yield in wheat is an example of a:	Agriculture Quantitative inheritance	Easy
42	In Nilsson-Ehle's wheat kernel colour cross with two gene pairs, the F₂ ratio was:	Agriculture Quantitative inheritance	Medium
43	If a trait is controlled by three additive gene pairs, what fraction of the F₂ resembles one extreme parent?	Agriculture Quantitative inheritance	Hard
44	Discontinuous variation is typical of characters that are:	Agriculture Quantitative inheritance	Easy
45	How many phenotypic classes are expected in the F₂ when a trait is controlled by four additive gene pairs?	Agriculture Quantitative inheritance	Medium
46	The proportion of observed variation in a trait that is due to genetic differences is called:	Agriculture Quantitative inheritance	Medium
47	Triticale, the first man-made cereal, was developed by crossing:	Agriculture Plant breeding: history, objectives and methods	Easy
48	The chemical commonly used to double the chromosome number in plants is:	Agriculture Plant breeding: history, objectives and methods	Easy
49	Pure-line selection is best suited to:	Agriculture Plant breeding: history, objectives and methods	Medium
50	The superiority of an F₁ hybrid over both its parents is called:	Agriculture Plant breeding: history, objectives and methods	Easy