Economic Botany Questions in English

(D) The high-yielding varieties of wheat were introduced during the Green Revolution in India.
$Sonika$,$Sharbati$ (specifically $Sharbati$ $Sonora$),and $Sonara$ (such as $Sonora-64$) are all well-known high-yielding and disease-resistant varieties of wheat developed to increase agricultural productivity.
Therefore,all the given options are correct.

(A) The plant $Sorghum \text{ } vulgare$ (commonly known as Jowar or Sorghum) is characterized by having small-sized grains compared to other cereals like $Zea \text{ } mays$ (maize) or $Hordeum \text{ } vulgare$ (barley). Therefore, it is the correct answer.

(C) China is the world's largest producer of wheat. It consistently ranks first in global wheat production due to its vast agricultural land and advanced farming practices. India is the second-largest producer,followed by Russia and the $U.S.A.$

(A) Cichorium intybus,commonly known as chicory,is a bushy perennial herbaceous plant.
It belongs to the family Asteraceae (also known as Compositae).
This family is characterized by the presence of inflorescence known as capitulum or head,which is a diagnostic feature of this family.

(A) $Triticum$ is the genus name for wheat,which is a cereal crop,not a millet.
$Pennisetum$ (Pearl millet/Bajra),$Panicum$ (Little millet/Kutki),and $Eleusine$ (Finger millet/Ragi) are all classified as millets.
Therefore,$Triticum$ is the correct answer.

(D) The cultivated tetraploid wheats, such as $Triticum \text{ } durum$ (macaroni wheat) and $Triticum \text{ } dicoccum$ (emmer wheat), originated in the Fertile Crescent region of the Middle East.
This region, encompassing parts of modern-day Iraq, Syria, Lebanon, Jordan, and Israel, is widely recognized as the primary centre of origin for these wheat species due to the presence of their wild progenitors, such as $Triticum \text{ } dicoccoides$.

(B) The ploidy levels of different wheat species are as follows:
$1$. $Triticum \text{ monococcum}$ (Einkorn wheat) is a diploid species $(2n = 14)$.
$2$. $Triticum \text{ dicoccum}$ (Emmer wheat) is a tetraploid species $(4n = 28)$.
$3$. $Triticum \text{ aestivum}$ (Bread wheat) is a hexaploid species $(6n = 42)$.
$4$. $Triticum \text{ compactum}$ (Club wheat) is also a hexaploid species $(6n = 42)$.
Therefore, Einkorn wheat is the correct answer.

(A) In India,different species of wheat are cultivated based on climatic conditions.
$Triticum$ $aestivum$ (Bread wheat) is the most common variety grown in the northern plains of India due to its adaptability to temperate climates.
$Triticum$ $dicoccum$ (Emmer wheat) is primarily grown in the southern parts of India,where the climate is warmer and more suitable for this specific variety.
Therefore,the correct sequence for north and south India is $T. aestivum$ and $T. dicoccum$ respectively.

(C) $T. sphaerococcum$ is commonly known as Indian dwarf wheat.
It is a hexaploid species of wheat that was historically cultivated in the Indian subcontinent.
$T. aestivum$ is common bread wheat,$T. turgidum$ is macaroni wheat,and $T. dicoccum$ is emmer wheat.

(D) Wheat flour is essential for bread making because it contains high levels of $Gluten$,a complex protein formed by the combination of $Gliadin$ and $Glutenin$. When water is added to wheat flour and the dough is kneaded,$Gluten$ forms a cohesive,elastic network. This network is crucial because it traps the $CO_2$ gas produced by yeast during fermentation,allowing the bread to rise and giving it a light,airy,and chewy texture.

(D) The disease known as 'Karnal bunt' or 'Bunt of wheat' is a fungal disease caused by the pathogen $Neovossia$ $indica$ (also known as $Tilletia$ $indica$).
This fungus infects the wheat grains,replacing the endosperm with black,powdery teliospores that have a foul,fishy odor due to the presence of trimethylamine.
$Puccinia$ $graminis$ causes black stem rust,while $Ustilago$ $tritici$ causes loose smut of wheat.

(C) $K.C. Mehta$ is known as the father of rust research in India. He conducted extensive studies on the life cycle of wheat rust fungi ($Puccinia$ species) in the Indian environment and identified the role of the Himalayas as a source of inoculum for the plains. His work was foundational in understanding the epidemiology of wheat rust in India.

(B) $Puccinia graminis tritici$ is a fungal pathogen that causes black stem rust in wheat plants.
This disease is characterized by the appearance of dark brown or black pustules on the stems and leaf sheaths of the wheat plant.
Therefore, the correct option is $B$.

(C) $Taichung$ $Native-1$ is a well-known semi-dwarf variety of rice.
It was developed in $Taiwan$.
This variety played a crucial role in the Green Revolution by providing high-yielding, short-statured plants that could withstand heavy fertilization without lodging.

(D) The genus $Oryza$ includes the cultivated rice species $Oryza \text{ sativa}$ and $Oryza \text{ glaberrima}$.
Wild relatives are species that are genetically related to cultivated crops and often possess traits like disease resistance or stress tolerance.
$Oryza \text{ perennis}$, $Oryza \text{ nivara}$, and $Oryza \text{ rufipogon}$ are all well-documented wild species of rice that serve as important genetic resources for crop improvement.
Therefore, all the listed options are wild relatives of cultivated rice.

(C) The improved variety of rice known as $IR-8$ was developed at the International Rice Research Institute $(IRRI)$,which is located in the Philippines.
It was introduced to India during the Green Revolution to increase agricultural productivity.

(C) The International Rice Research Institute $(IRRI)$ is a premier research and training organization dedicated to reducing poverty and hunger,improving the health of rice farmers and consumers,and ensuring environmental sustainability of rice farming.
It is headquartered in Los Baños,Philippines.

(D) Bran is the hard outer layer of cereal grains. It consists of the combined aleurone and pericarp. It is rich in dietary fiber and essential nutrients,but it is not primarily composed of starch,proteins,or lipids. However,in the context of typical multiple-choice questions regarding grain composition,bran is often associated with the fibrous outer layer that contains minerals and vitamins. Given the options provided and standard biological classification,bran is most accurately described as being rich in minerals and dietary fiber compared to the endosperm,which is predominantly starch.

(C) Flint rice,often referred to in the context of starch composition,is characterized by its specific amylose content.
In cereal chemistry,rice varieties are classified based on their amylose content.
Flint-type rice typically contains a high proportion of amylose compared to waxy or glutinous rice varieties.
High amylose content in rice leads to a firmer texture upon cooking,which is a defining characteristic of flint rice.
Therefore,it is characterized by low dextrin and high amylose content.

(A) The brown leaf spot disease of rice is caused by the fungus $Helminthosporium$ $oryzae$ (also known as $Bipolaris$ $oryzae$).
This pathogen leads to the formation of characteristic brown,oval-shaped spots on the leaves,leaf sheaths,and glumes of the rice plant.
This disease was responsible for the Great Bengal Famine of $1943$ due to significant crop loss.

(D) The correct answer is $D$.
$Calanoluca oryzae$ (often referred to in the context of stored grain pests) is a pathogen/pest associated with stored rice.
$Helminthosporium oryzae$ causes brown leaf spot of rice.
$Piricularia oryzae$ causes blast disease of rice.
$Xanthomonas oryzae$ causes bacterial leaf blight of rice.

(C) The $Six-rowed$ variety of barley ($Hordeum$ $vulgare$) is generally preferred for food purposes.
It typically contains a higher protein content compared to the two-rowed varieties,which are more commonly used for malting and brewing purposes.
Therefore,the correct option is $C$.

(A) Maize $(Zea \ mays)$ is a member of the grass family $(Poaceae)$.
It is widely cultivated as a staple food crop and is classified as a cereal grain.
Cereals are grasses cultivated for the edible components of their grain (botanically,a type of fruit called a caryopsis).
Therefore,maize belongs to the category of cereals.

(B) Maize,also known as Indian-corn $(Zea \ mays)$,is a cereal grain that was first domesticated by indigenous peoples in southern Mexico.
Botanical and archaeological evidence indicates that its origin is in the tropical regions of South America and Mexico.
Therefore,it is considered a native of Tropical South America.

(A) Maize grains are a good source of $B$-complex vitamins,particularly thiamine $(Vitamin B_1)$.
However,maize is notably deficient in essential amino acids like lysine and tryptophan.
Therefore,the correct option is $A$.

(C) Maize $(Zea \, mays)$ is a staple cereal crop, but it is nutritionally incomplete regarding its protein quality.
Specifically, maize proteins (zeins) are significantly deficient in two essential amino acids: $Tryptophan$ and $Lysine$.
Because these amino acids are not synthesized in sufficient quantities by the plant, maize-based diets often require supplementation with other protein sources to ensure a balanced intake of essential amino acids.

(A) The botanical name of sweet corn is $Zea \text{ } mays \text{ } var. \text{ } saccharata$ (also known as $var. \text{ } rugosa$).
$Zea \text{ } mays \text{ } var. \text{ } amylacea$ refers to flour corn.
$Zea \text{ } mays \text{ } var. \text{ } indentata$ refers to dent corn.
$Zea \text{ } mays \text{ } var. \text{ } everta$ refers to popcorn.

(B) The botanical name of popcorn is $Zea \ mays \ var. \ everta$.
Popcorn is a variety of maize characterized by a hard outer shell and a starchy endosperm that expands and puffs up when heated.
Other varieties include $Zea \ mays \ var. \ tunicata$ (pod corn),$Zea \ mays \ var. \ indentata$ (dent corn),and $Zea \ mays \ var. \ amylacea$ (flour corn).

(C) Buckwheat,scientifically known as $Fagopyrum$ $esculentum$,is a plant cultivated for its grain-like seeds.
It belongs to the family $Polygonaceae$.
It is widely used to make 'Kutu' flour,which is a popular food item consumed during religious fasting periods in India.

(C) pulse crop refers to the edible seeds of legumes.
$Cajanus cajan$,commonly known as pigeon pea or arhar,is a widely cultivated pulse crop in India.
$Phaseolus vulgaris$ is the common bean,$Glycine max$ is soybean (an oilseed),and $Vicia faba$ is the fava bean.
Therefore,$Cajanus cajan$ is the correct answer.

(A) The green gram (also known as mung bean) is botanically known as $Vigna \text{ } radiata$ (formerly classified as $Phaseolus \text{ } aureus$ or $Phaseolus \text{ } radiatus$).
The black gram (also known as urad dal) is botanically known as $Vigna \text{ } mungo$ (formerly classified as $Phaseolus \text{ } mungo$).
In the context of traditional botanical nomenclature often used in textbooks, green gram is $Phaseolus \text{ } aureus$ and black gram is $Phaseolus \text{ } mungo$.
Therefore, the correct option is $A$.

(B) The pulse beetle,scientifically known as $Callosobruchus$ $chinensis$,is a major storage pest of various pulses (legumes).
It infests seeds in the field and continues to damage them during storage,leading to significant economic losses.

(B) Pulse crops belong to the family $Fabaceae$.
These plants possess root nodules that contain symbiotic nitrogen-fixing bacteria,such as $Rhizobium$.
These bacteria convert atmospheric nitrogen $(N_2)$ into ammonia,which the plant can readily use for growth.
Due to this natural nitrogen-fixing ability,pulse crops do not require additional nitrogenous fertilizers.

(C) India is the largest producer of gram $(Chickpea)$ in the world.
It accounts for a significant portion of the global production of this pulse crop.

(D) The question asks for a pulse that is not native to India.
Historically,$Cicer$ $arietinum$ (Gram),$Phaseolus$ $mungo$ (Black gram),and $Phaseolus$ $aureus$ (Green gram) are all considered to have originated in the Indian subcontinent or are ancient crops cultivated in India for thousands of years.
Since all the options listed are native to India,the question as stated is technically incorrect or implies a trick.
However,in many botanical contexts,if one must choose,it is important to note that these are all indigenous to the region.
Given the options provided,there is no correct answer as all are native.

(C) The centre of origin of gram ($Cicer$ $arietinum$) is considered to be South-west Asia,specifically the region encompassing Turkey,Iran,and Afghanistan.
It is one of the oldest cultivated legumes in the world,with archaeological evidence of its cultivation dating back to $7000$ $BC$ in this region.

(A) $Cicer$ $arietinum$ (chickpea) is a $Rabi$ crop in India.
It is sown at the end of the rainy season (October-November) and harvested in spring.
In contrast,$Cajanus$ $cajan$ (pigeon pea),$Phaseolus$ $mungo$ (black gram),and $Phaseolus$ $aureus$ (green gram) are typically grown as $Kharif$ crops during the rainy season.

(D) Soybean $(Glycine \ max)$ is considered a highly nutritious food source. It contains a high percentage of protein (approx. $40\%$),significant amounts of carbohydrates,healthy fats (polyunsaturated fatty acids),and essential vitamins and minerals. Among the given options,soybean provides the most balanced profile of these macronutrients and micronutrients,making it a superior dietary source.

(D) The energy content of food is measured in kilocalories (kcal).
One pound of peanuts is approximately $453.6$ grams.
Peanuts are rich in fats,which provide about $9$ kcal per gram,while proteins and carbohydrates provide about $4$ kcal per gram.
Given the high fat content,one pound of peanuts provides approximately $2600$ to $2700$ kcal of energy.
Therefore,the correct option is $2700$ kcal.

(C) China is the largest producer of groundnuts in the world,followed by India. Among the given options,India is the leading producer of groundnuts.

(A) Wheat $(Triticum \text{ } aestivum)$ is considered the most important cereal crop at the world level in terms of total production and global consumption. It serves as a staple food for a large portion of the human population across various continents.

(C) Pulses belong to the family $Fabaceae$ (Leguminosae).
These plants have a symbiotic relationship with nitrogen-fixing bacteria like $Rhizobium$ in their root nodules.
These bacteria convert atmospheric nitrogen $(N_2)$ into ammonia,which the plant uses to synthesize amino acids.
Since proteins are polymers of amino acids,the high availability of nitrogen through this fixation process makes pulses rich in proteins.

(B) The 'Indian Grassland and Fodder Research Institute' $(IGFRI)$ is a premier research institute under the Indian Council of Agricultural Research $(ICAR)$.
It is situated in Jhansi,Uttar Pradesh,India.
It was established in $1962$ to conduct research on grassland and fodder crops to support livestock production.

(A) Groundnut, scientifically known as $Arachis \text{ } hypogaea$, is a member of the family $Fabaceae$ (also known as $Leguminosae$).
This family is characterized by the presence of root nodules containing nitrogen-fixing bacteria and fruits that are typically legumes or pods.

(A) Wheat and rice are cereals belonging to the family $Poaceae$ (or $Gramineae$).
In these plants,the fruit is a caryopsis,where the seed coat is fused with the fruit wall (pericarp).
The bulk of the grain consists of the endosperm,which stores starch and proteins.
Therefore,the edible part of wheat and rice is the endosperm.

(B) The term 'New World' refers to the Americas,while the 'Old World' refers to Africa,Asia,and Europe.
Maize $(Zea \ mays)$ originated in the Americas (New World) and was introduced to the rest of the world (Old World) following the voyages of Christopher Columbus.
Wheat,Barley,and Rice are crops that originated in the Old World (specifically the Fertile Crescent and Asia) and were cultivated there long before the discovery of the Americas.

(C) The rice weevil,$Sitophilus$ $oryzae$,is a major stored-product pest that infests rice grains in storage.
$Xanthomonas$ $oryzae$ causes bacterial leaf blight.
$Helminthosporium$ $oryzae$ causes brown spot disease of rice.
$Piricularia$ $oryzae$ causes rice blast disease.
Therefore,$Sitophilus$ $oryzae$ is the correct answer as it is a storage pest/pathogen.

(D) The 'Old World' refers to Africa, Asia, and Europe, while the 'New World' refers to the Americas.
Plants such as corn, potato, and sweet potato are native to the Americas (New World) and were introduced to the Old World after the voyages of Christopher Columbus.
Rice $(Oryza \, sativa)$ is native to Asia (Old World) and was introduced to the Americas (New World) by European explorers and settlers.
Therefore, rice is the correct answer as it originated in the Old World and was introduced to the New World.

(B) The 'New World' refers to the Americas, while the 'Old World' refers to Africa, Asia, and Europe.
Many crops originated in the Americas and were introduced to the rest of the world after the $15^{th}$ century.
Potato ($Solanum$ $tuberosum$) is a well-known crop that originated in the Andes region of South America (New World) and was introduced to Europe and the rest of the world (Old World) by explorers.
Wheat, Rice, and Sugarcane are crops that originated in the Old World (Asia/Middle East).

(B) The Central Rice Research Institute $(CRRI)$ is located in Cuttack,Odisha.
It was established on $23$ April $1946$ to conduct research on rice cultivation and improvement.
It is now known as the National Rice Research Institute $(NRRI)$.