Economic Botany Questions in English

(B) The correct answer is $B$. Tea is obtained from the leaves of the plant $Camellia$ $sinensis$,which belongs to the family $Theaceae$. The leaves are processed to produce the beverage known as tea,making them economically significant.

(A) Saffron is a spice derived from the flower of $Crocus \text{ } sativus$.
Specifically, the dried dark red stigmas and the top portion of the style are collected and used as the spice known as saffron.
These parts are carefully hand-picked from the flower, making saffron one of the most expensive spices in the world.

(B) . $Rauwolfia$ $serpentina$: The dried roots of this plant are an important source of the alkaloid reserpine.
The alkaloid reserpine is used in several medicinal drugs because it acts as a depressant on the central nervous system,which helps in producing sedation and lowering blood pressure.

(D) Silviculture is the branch of forestry that deals with the cultivation,development,and care of forest trees.
Apiculture refers to the rearing of honey bees.
Sericulture refers to the rearing of silkworms for the production of silk.
Agriculture is the science and practice of farming,including cultivation of the soil for the growing of crops and the rearing of animals to provide food,wool,and other products.
Therefore,the correct option is $D$.

(B) Quinine $(C_{20}H_{24}N_2O_2)$ is an alkaloid obtained from the bark of the $Cinchona$ tree.
It is a well-known antimalarial drug that suppresses the asexual erythrocytic stages of malarial parasites.
It also has a mild effect on the gametocytes of $Plasmodium \ vivax$ and $Plasmodium \ malariae$.

(C) The coffee plant $(Coffea \ arabica)$ is native to the tropical forests of Ethiopia. It was first discovered in the Kaffa region of Ethiopia,from where it spread to other parts of the world.

(B) Tea $(Camellia \ sinensis)$ is widely recognized as a plant that originated in China. It has been cultivated there for thousands of years for its medicinal and beverage properties. While other plants like orange also have origins in Southeast Asia/China,tea is the most historically significant cultivated plant associated with Chinese origin in botanical studies.

(B) $Hevea$ $brasiliensis$, commonly known as the Pará rubber tree, is a flowering plant in the spurge family, $Euphorbiaceae$.
It is native to the Amazon rainforest in $Brazil$.
It was later introduced to other tropical regions like $Malaysia$ and $South-east$ $Asia$ for commercial rubber production.

(D) . Silviculture is the branch of forestry that deals with the cultivation,development,and care of forest trees. It involves growing forest crops in a desired pattern to ensure sustainable yield and forest health.

(D) Broom corn is a variety of $Sorghum$ $bicolor$ (specifically $Sorghum$ $bicolor$ var. $technicum$).
It is cultivated for its long,stiff panicle branches which are used to make brooms.
Since $Sorghum$ is not listed in the options $A$,$B$,or $C$,the correct answer is $D$.

(B) The plant $Papaver$ $somniferum$,commonly known as the opium poppy,produces fruits (capsules) that contain latex.
This latex is the source of opium,which contains various alkaloids such as morphine and codeine,known for their narcotic properties.
$Jatropha$ is primarily known for its seeds,which are used for biodiesel production,and it is not classified as a narcotic plant.
Therefore,the correct answer is $Opium$.

(C) . Wheat is a Rabi crop,which means it is sown in the winter season,typically in October and November,and harvested in the spring.

(A) $Triticum \text{ } spelta$, commonly known as spelt wheat, is a hexaploid species of wheat.
It is primarily cultivated in parts of Europe, specifically in countries like Germany, Switzerland, and Spain, as well as in the $USA$.
Therefore, the most appropriate option among the given choices is $USA$ and Spain.

(D) Canada,India,and Australia are all significant producers and exporters of wheat in the global market.
Canada is known for its high-quality hard red spring wheat.
India is one of the world's largest producers and periodically exports wheat based on domestic surplus.
Australia is a major exporter of wheat,particularly to Asian markets.

(C) Wheat straw is a byproduct of wheat cultivation. It is commonly used as cattle feed (fodder) for livestock. Additionally,due to its fibrous nature,it is used as a filling material for mattresses,cushions,and for stuffing chairs. Therefore,both $(a)$ and $(b)$ are correct.

(A) Maize is primarily grown as a $Kharif$ crop in India.
$Kharif$ crops are sown at the beginning of the monsoon season,typically in $June-July$,and harvested in $September-October$.

(C) Sweet corn $(Zea \text{ } mays \text{ } var. \text{ } saccharata)$ is a variety of maize grown for human consumption with a high sugar content. Unlike other varieties of corn that are harvested when the kernels are mature and starchy, sweet corn is harvested during the milky stage. During this stage, the sugar in the kernels has not yet been converted into starch, resulting in a naturally sweet taste.

(D) Rice crops are susceptible to various pathogens including bacteria and fungi.
$1$. Bacterial wilt is caused by $Ralstonia$ $\text{solanacearum}$.
$2$. False smut is a fungal disease caused by $Ustilaginoidea$ $\text{virens}$.
$3$. Neck rot (also known as blast disease) is caused by the fungus $Magnaporthe$ $\text{oryzae}$.
Since all these diseases affect rice, the correct option is $D$.

(D) Wheat is a major cereal crop susceptible to various fungal pathogens.
$A$. Loose smut is caused by the fungus $Ustilago$ $tritici$.
$B$. Flag smut is caused by $Urocystis$ $tritici$.
$C$. Stem rust (also known as black rust) is caused by $Puccinia$ $graminis$ $tritici$.
Since all these diseases commonly affect wheat crops in the field,the correct answer is $D$.

(C) China is the world's largest producer of rice. It accounts for a significant portion of global rice production due to its favorable climate,extensive river systems,and long-standing agricultural practices in the Yangtze and Pearl River basins.

(A) $Avena sativa$, commonly known as oats, is a species of cereal grain grown for its seed.
It is widely cultivated and used as a nutritious feed for livestock, particularly horses and cattle, due to its high protein and fiber content.
Therefore, it is primarily used as cattle feed.

(B) Millets are a group of highly variable small-seeded grasses,widely grown around the world as cereal crops or grains for fodder and human food.
$A$. Wheat is a cereal grain.
$B$. Bajra (Pearl millet) is a widely cultivated type of millet.
$C$. Rice is a cereal grain.
Therefore,$B$ is the correct answer.

(D) Millets are a group of highly variable small-seeded grasses,widely grown around the world as cereal crops or grains for fodder and human food.
$Panicum$ (commonly known as little millet or proso millet),$Paspalum$ (kodo millet),and $Setaria$ (foxtail millet) are all recognized genera of millets.
Therefore,all the given options are correct.

(A) Chickpea $(Cicer \text{ } arietinum)$ belongs to the family $Fabaceae$.
Legumes like chickpeas are well-known for being rich sources of plant-based proteins.
They provide essential amino acids required for human nutrition.
Therefore, the correct option is $A$.

(D) $Pisum sativum$ (garden pea) is a member of the family $Fabaceae$.
In botanical terms, the fruit of the pea plant is a legume (pod).
However, in culinary and agricultural contexts, it is commonly classified as a pulse when the seeds are dried and consumed, or as a vegetable when the fresh pods or seeds are consumed.
Therefore, it can be categorized differently based on its stage of development and usage.

(B) Arhar,scientifically known as $Cajanus\, cajan$,belongs to the genus $Cajanus$. It is a member of the family $Fabaceae$ (formerly known as $Leguminosae$ or $Papilionaceae$).

(A) Lobia is the common name for the plant $Vigna \, unguiculata$.
It belongs to the family $Fabaceae$ and is widely cultivated for its edible beans.

(A) The scientific name of kidney bean is $Phaseolus \ vulgaris$.
$Cicer \ arietinum$ is the scientific name for chickpea (gram).
$Cajanus \ cajan$ is the scientific name for pigeon pea (tur dal).
Therefore,the correct option is $A$.

(A) $Phaseolus \text{ } acontifolius$ is the scientific name for the Moth bean.
It is a drought-resistant legume primarily grown in arid and semi-arid regions of India.
It is a rich source of protein and is commonly consumed as a pulse.

(A) Soybean $(Glycine\, max)$ is a legume widely used to produce plant-based milk,often referred to as artificial milk or soy milk.
This milk is highly nutritious,rich in proteins,and is frequently used as a substitute for cow's milk,especially for infants who are lactose intolerant or allergic to dairy.

(C) The correct answer is $(C)$. Ergot of bajra is caused by the fungus $Claviceps \text{ } purpurea$. This fungus produces toxic alkaloids known as ergot alkaloids. When cattle consume fodder or grains infected with these ergot sclerotia,it can lead to ergotism,which is known to cause abortion in pregnant cattle.

(D) The correct answer is $Lathyrus$ $sativus$ (Khesari dal).
Excessive consumption of $Lathyrus$ $sativus$ seeds leads to a condition known as $Lathyrism$.
This disease is caused by a neurotoxin present in the seeds called $BOAA$ $(\beta-N-oxalylamino-L-alanine)$.
It results in paralysis of the lower limbs.

(A) Among the given options, the seed of almond $(Prunus \text{ } dulcis)$ is widely recognized for its high nutritional density.
It is an excellent source of healthy fats, protein, dietary fiber, Vitamin $E$, and essential minerals like magnesium and calcium.
While other seeds like $Cucurbita$ (pumpkin seeds) and $Daucus \text{ } carota$ (carrot seeds) also possess nutritional benefits, almonds are nutritionally superior in terms of their overall profile of macronutrients and micronutrients.

(D) In $1963$,several high-yielding and disease-resistant wheat varieties were introduced in India from Mexico. Specifically,$4$ Mexican dwarf wheat varieties were brought in to initiate the Green Revolution. These varieties,such as $Sonalika$ and $Kalyan Sona$,were highly responsive to fertilizers and played a crucial role in increasing wheat production in India.

(C) $Kalyan Sona$ is a high-yielding,semi-dwarf variety of wheat developed during the Green Revolution in India.
It was introduced to improve wheat production.
This variety is known for its short stature (dwarfness) which prevents lodging and makes it resistant to various diseases,particularly rusts.
Therefore,it possesses both dwarfness and disease resistance.

(D) $PV-18$ is a semi-dwarf variety of wheat developed in India.
It is characterized by having red-colored grains.
Compared to modern high-yielding varieties,it is known to have lower protein content and is generally considered less nutritive.

(D) The wheat variety 'Chhoti Lerma' is a semi-dwarf variety that was introduced in India from Mexico. It was not developed at any of the mentioned Indian research institutes (Pantnagar,$IARI$,or Ludhiana). Therefore,the correct option is $D$.

(D) The rice varieties $Basmati 370$,$J.K.W. 277$,and $Zona 349$ are all well-known high-yielding or improved varieties that have been historically cultivated in the plains of the Punjab region.
Therefore,all the listed options are correct.

(D) The germplasm for preparing hybrid varieties of maize was imported into India from Mexico,Cuba,and America.
These diverse genetic resources were utilized by Indian scientists to develop high-yielding hybrid varieties of maize,which played a significant role in increasing agricultural productivity.

(A) Maize $(Zea \, mays)$ is a monocotyledonous plant that completes its entire life cycle, from germination to seed production and death, within a single growing season. Therefore, it is classified as an annual plant.

(B) $Secale cereale$, commonly known as rye, is a cereal grain that is widely cultivated for its grain, straw, and as a forage crop.
It is a staple food in many parts of Eastern and Central Europe, where it is primarily used to produce rye bread, which is a significant part of the traditional diet in these regions.

(A) Finger millet, commonly known as Ragi, is scientifically classified as $Eleusine \text{ coracana}$. Therefore, it belongs to the genus $Eleusine$.

(A) Bengal gram,commonly known as chickpea,belongs to the genus $Cicer$. The scientific name of the chickpea is $Cicer$ $arietinum$.
$Cajanus$ refers to the genus of pigeon pea ($Cajanus$ $cajan$),and $Glycine$ refers to the genus of soybean ($Glycine$ $max$). Therefore,the correct genus for Bengal gram is $Cicer$.

(C) Both $Prunus$ (which includes almonds) and $Pistacia$ (pistachios) are well-known for their high protein content.
Almonds $(Prunus \text{ dulcis})$ are rich in plant-based protein, healthy fats, and fiber.
Pistachios $(Pistacia \text{ vera})$ are also an excellent source of protein, containing all nine essential amino acids.
Therefore, both options are correct.

(A) The chestnut, $Castanea \text{ } sativa$, is a unique nut known for its high carbohydrate content, primarily in the form of starch, unlike most other nuts which are rich in fats and proteins.
$Fagus \text{ } sylvatica$ (European beech) produces nuts that are generally not consumed as a primary carbohydrate source, and $Pistacia$ (pistachio) is primarily rich in fats and proteins.

(A) The term $Karalam$ is derived from the Malayalam or Sanskrit language,where $Kera$ refers to the coconut palm and $Alam$ refers to land. Therefore,$Karalam$ means the land of coconuts. Kerala is famously known for its extensive coconut plantations.

(A) $Triticum$ $vulgare$ (common wheat) is a hexaploid species.
It has a basic chromosome number of $x = 7$.
Since it is hexaploid $(6x)$,the total chromosome number is $6 \times 7 = 42$.
Therefore,the diploid chromosome number is $2n = 42$.

(B) Rice grain is primarily composed of starch,which is a carbohydrate.
It contains approximately $90\%$ carbohydrate,$8-10\%$ protein,$1\%$ fat,and about $1\%$ minerals.
Therefore,the correct option is $B$.

(C) The botanical name of Bajra,commonly known as Pearl millet,is $Pennisetum \, typhoides$ (also known as $Cenchrus \, americanus$).
$Eleusine \, coracana$ is the botanical name for Finger millet (Ragi).
$Sorghum \, vulgare$ is the botanical name for Sorghum (Jowar).
$Oryza \, sativa$ is the botanical name for Rice.

(D) The genus $Triticum$ (wheat) exhibits polyploidy.
$Triticum$ $turgidum$,$Triticum$ $polonicum$,and $Triticum$ $durum$ are all tetraploid species of wheat.
Tetraploid wheat species have a chromosome number of $2n = 4x = 28$,where the basic chromosome number is $x = 7$.
Therefore,all the listed species possess $2n = 28$ chromosomes.