Economic Botany Questions in English

(D) fossil is any preserved remains,impression,or trace of any once-living thing from a past geological age.
$1$. Diatomaceous earth consists of fossilized remains of diatoms,which are a type of hard-shelled protist.
$2$. Coal is a combustible black or brownish-black sedimentary rock,formed as rock strata called coal seams,composed primarily of carbon along with variable quantities of other elements,primarily hydrogen,sulfur,oxygen,and nitrogen. It is formed from the remains of ancient plants.
$3$. Petroleum is a naturally occurring,yellowish-black liquid found in geological formations beneath the Earth's surface,which is also commonly referred to as a fossil fuel because it is formed from the remains of ancient marine organisms.
Therefore,all the given options are considered fossils or fossil fuels.

(A) Coal balls are spherical or irregular masses of mineral matter found in coal seams.
They are formed by the infiltration of mineral-rich solutions (like calcium carbonate or silica) into plant tissues before they are compressed into coal.
This process preserves the internal cellular structure of the plants in three dimensions,which is characteristic of petrifaction.
Therefore,the fossils found within coal balls are primarily of the petrifaction type.

(C) The $Carboniferous$ period is widely regarded as the coal age. During this period,vast swamp forests covered much of the tropical land areas. When these plants died,they were buried in anaerobic conditions,preventing complete decay and eventually transforming into extensive coal deposits over millions of years.

(D) Plants belonging to the families $Euphorbiaceae$,$Asclepiadaceae$,and $Apocynaceae$ are known to produce latex that contains hydrocarbons.
These hydrocarbons can be processed into liquid fuels,often referred to as 'petro-crops' or 'bio-crude'.
For example,species like $Euphorbia$ $lathyris$ $(Euphorbiaceae)$ have been studied for their potential to produce fuel-grade hydrocarbons.
Therefore,all the listed families contain plants that contribute to the formation of liquid fuel.

(B) Based on historical environmental studies and resource depletion models often cited in educational contexts regarding non-renewable energy,it is estimated that approximately $80\%$ of the world's known petroleum reserves will be exhausted by the year $2025$ due to high global consumption rates.

(A) When coal is heated in the absence of air,a process known as destructive distillation occurs. This process yields several useful products,including coal gas,coal tar,and coke. Therefore,these are all products derived from coal.

(D) Coal balls are petrified plant materials found in coal seams.
They are primarily composed of mineral matter,specifically $CaCO_3$ (calcium carbonate),$MgCO_3$ (magnesium carbonate),and $FeS_2$ (iron sulphide).
These minerals infiltrate the plant tissues,preserving them in a fossilized state.
Therefore,all the listed substances are components of coal balls.

(B) Coal is a fossil fuel formed over millions of years from the remains of ancient plants. Because it takes such a vast amount of time to form and cannot be replenished on a human timescale,it is classified as a $Non-renewable$ source of energy.

(C) . Brazil is the pioneer country in the production of fuel alcohol,which is used in automobiles like cars,buses,and motorcycles as a substitute for petroleum.

(A) Palaeobotany is the branch of science that deals with the study of plant fossils.
Coal and petroleum are fossil fuels formed from the remains of ancient plants and organisms that were buried under the Earth's crust millions of years ago.
By studying plant fossils (Palaeobotany),scientists can identify the geological strata and environmental conditions that favor the formation and accumulation of these fossil fuels,thereby helping in their detection.

(B) Petrocrops are plants that produce latex containing a high proportion of liquid hydrocarbons,which can serve as a substitute for liquid fuels.
Most of these plants belong to the family $Euphorbiaceae$,as well as $Asclepiadaceae$,$Urticaceae$,and $Sapotaceae$.

(D) Pyrolysis is the thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen.
During this process,the organic material breaks down into three main products: solid charcoal,non-condensable gases,and liquid bio-oil.
Therefore,the correct answer is $D$.

(B) Melvin $Calvin$ is credited with identifying $petro-crops$ (hydrocarbon-producing plants).
He proposed that certain plants,such as those belonging to the family $Euphorbiaceae$,could be cultivated to produce latex or hydrocarbons that can be converted into liquid fuels.
This research was significant in the context of finding renewable energy sources.

(D) Petroleum plants are those plants that produce hydrocarbons,which can be converted into fuel.
These plants belong to various families such as Euphorbiaceae (e.g.,$Euphorbia\, lathyrus$),Asclepiadaceae,Apocynaceae,and Asteraceae (e.g.,$Brickellia\, sp.$).
Therefore,both $Euphorbia\, lathyrus$ and $Brickellia\, sp.$ are classified as petroleum plants.

(D) Petro-plants are plants that produce hydrocarbons,which can be converted into petroleum-like fuels.
These plants are found in various families,including $Euphorbiaceae$,$Asclepiadaceae$,$Apocynaceae$,$Compositae$,$Labiatae$,and $Sapotaceae$.
Since the options $A$,$B$,and $C$ are all families that contain species known as petro-plants,the correct answer is $D$.

(A) The two-rowed variety of Barley $(Hordeum \text{ } vulgare \text{ } subsp. \text{ } distichon)$ is preferred for the production of malt whisky, beer, and other alcoholic beverages.
This is because the two-rowed variety typically has a higher starch content and lower protein content compared to the six-rowed variety, which results in a better quality of malt and a more desirable flavor profile for brewing and distilling.

(C) $Secale$ $cereale$,commonly known as rye,is a cereal grain belonging to the grass family $Poaceae$.
It is widely used in the fermentation industry for the production of various alcoholic beverages.
Specifically,rye is a key ingredient in the brewing of certain types of beer (rye beer) and the distillation of rye whiskey,which is a type of spirit often categorized under wine-making or distilled beverage production processes in general botany contexts.
Therefore,it is used for the preparation of both beer and spirits/wine-related products.

(B) $Cinnamomum$ $zeylanicum$ $(Dalchini)$ belongs to the $Lauraceae$ family. It is a well-known spice obtained from the dried inner bark of the tree.

(C) The correct matching of plants with their respective families is as follows:
$1$. Lodh tree ($Symplocos$ $racemosa$) belongs to the family $Symplocaceae$ $(III)$.
$2$. Quinine ($Cinchona$ $officinalis$) belongs to the family $Rubiaceae$ $(VI)$.
$3$. Kachnar ($Bauhinia$ $variegata$) belongs to the family $Caesalpiniaceae$ $(V)$.
$4$. Indian oak or Hijal ($Barringtonia$ $acutangula$) belongs to the family $Lecythidaceae$ $(I)$.
$5$. Dalchini or Cinnamon ($Cinnamomum$ $verum$) belongs to the family $Lauraceae$ $(II)$.
$6$. Rohan or Rohituka ($Aphanamixis$ $polystachya$) belongs to the family $Meliaceae$ $(IV)$.
Therefore, the correct sequence is $1-III, 2-VI, 3-V, 4-I, 5-II, 6-IV$.

(A) The botanical name $Piper \text{ } betle$ refers to the betel plant, commonly known as $Pan$ in India.
It belongs to the family $Piperaceae$.
The leaves of this plant are widely used for chewing, often with areca nut and lime.

(B) Condiments are substances used to add flavor to food.
$Curcuma$ (Turmeric) is a widely used spice and condiment.
$Ferula$ (Asafoetida/Hing) is a well-known resinous gum used as a condiment in cooking.
$Papaver$ (Poppy) is primarily used for seeds or medicinal alkaloids,and $Cinchona$ is the source of quinine,used for medicinal purposes.
Therefore,the correct pair is $Curcuma$ and $Ferula$.

(A) The commercial nutmeg is obtained from the seeds of the tree $Myristica$ $fragrans$.
This plant belongs to the genus $Myristica$ and the family $Myristicaceae$.
It is widely cultivated for its aromatic seeds,which are used as a spice in various culinary preparations.

(C) Catechu,commonly known as Kattha,is obtained from the heartwood and bark of the $Acacia \, catechu$ tree,which belongs to the family $Mimosaceae$. The wood is boiled in water to extract the substance,which is then concentrated and solidified.

(A) Cinnamon is obtained from the bark of the tree $Cinnamomum \ zeylanicum$ (also known as $Cinnamomum \ verum$).
It belongs to the family $Lauraceae$.
$Eugenia \ caryophyllata$ is the source of clove,$Coriandrum \ sativum$ is coriander,and $Capsicum \ annum$ is chili pepper.

(A) Saffron,scientifically known as $Crocus\, sativus$,belongs to the family $Iridaceae$.
It is obtained from the dried stigmas and the top portion of the styles of the flower.
These parts are widely used as valuable colouring and flavouring agents in food and medicinal preparations.

(C) The clove $(Syzygium\, aromaticum)$ belongs to the Myrtaceae family.
It is obtained from the dried flower bud of the plant.

(B) Turmeric,scientifically known as $(Curcuma \, longa)$,belongs to the family $Zingiberaceae$.
The turmeric powder used as a spice and for medicinal purposes is obtained from the dried rhizome of the plant.
$A$ rhizome is a modified underground stem that grows horizontally and stores nutrients.

(C) Ginger $(Zingiber\, officinale)$ is a modified underground stem known as a rhizome.
Rhizomes are characterized by horizontal growth,distinct nodes and internodes,and the presence of scale leaves.
It is widely used as a spice for flavoring food and possesses significant medicinal properties.

(B) $Vitis$ (commonly known as grapevine) belongs to the family $Vitaceae$.
It is widely cultivated for its fruits,which are known as grapes.
These grapes are extensively used in the production of wine through the process of fermentation.
Therefore,the correct option is $B$.

(C) Bhojpatra is obtained from the bark of the tree $Betula \text{ } utilis$, which belongs to the family $Betulaceae$. In ancient India, the treated bark of this tree was widely used as a writing material, serving the purpose of paper for manuscripts.

(D) Timber refers to wood,which is derived from the secondary xylem of trees. During secondary growth in dicot stems,the vascular cambium produces secondary xylem towards the inner side,which accumulates over time to form wood or timber.

(B) The coffee plant $(Coffea \, arabica)$ belongs to the family $Rubiaceae$.
Coffee is a popular beverage obtained from the roasted seeds of this plant,which are commonly referred to as coffee beans.

(B) Commercial cutch, also known as $Katha$, is a concentrated extract obtained from the heartwood of $Acacia$ $catechu$.
It is widely used in the preparation of $Paan$ and has various medicinal and industrial applications, such as in dyeing and tanning.

(A) The tobacco plant, scientifically known as $Nicotiana \, tabacum$, is a member of the family $Solanaceae$.
This family is also known as the nightshade family and includes other important plants like potatoes, tomatoes, and peppers.

(B) The botanical name of the peepal tree is $Ficus \ religiosa$.
$Cajanus \ cajan$ is the scientific name of pigeon pea (tur).
$Pisum \ sativum$ is the scientific name of garden pea.
$Ficus \ benghalensis$ is the scientific name of the banyan tree.

(C) Germinating barley seeds are known as malt.
During the germination process, enzymes like amylase are produced, which convert starch into fermentable sugars.
These sugars are then fermented by yeast $(Saccharomyces \text{ } cerevisiae)$ to produce beer.
Therefore, germinating barley seeds are a primary ingredient in the brewing of beer.

(B) The lightest wood known is obtained from the tree $Ochroma$ $lagopus$,commonly known as the $Balsa$ tree.
Its wood has a very low density,making it extremely lightweight yet strong,which is why it is widely used in model building,insulation,and life-saving equipment.

(C) The botanical name of tea is $Camellia \ sinensis$.
Historically,it was also referred to as $Thea \ sinensis$.
Among the given options,$Thea \ sinensis$ is the correct scientific name used for the tea plant.

(A) India ranks second in the production of tea globally,following China,and is one of the world's leading exporters of tea. Due to its significant contribution to the national economy through exports,tea is considered a major cash crop and a primary source of foreign exchange for India.

(C) $Dalbergia \text{ } sissoo$ is commonly known as Indian rosewood.
It is a high-quality timber tree widely used for making premium furniture and cabinets.

(A) The pungency or spicy taste of chillies is caused by a chemical compound known as capsaicin $({C_{18}}{H_{27}}N{O_3})$.
Capsaicin is an active component of chilli peppers,which are plants belonging to the genus $Capsicum$.
It acts as a chemical irritant for mammals,including humans,and produces a sensation of burning in any tissue with which it comes into contact.

(A) Chicory $(Cichorium \text{ } intybus)$ is a plant whose roots are harvested for commercial use.
In regions like Gujarat, these roots are dried, roasted, and ground into a powder.
This powder is then mixed with coffee powder to enhance the flavor and body of the coffee, a product commonly known as chicory blend coffee.

(C) $T. turgidum$ (also known as $Triticum$ $durum$) is a tetraploid species of wheat,commonly referred to as macaroni or solid wheat.
$T. compactum$ is a hexaploid species of wheat,commonly referred to as club wheat.

(D) Archaeological evidence from various sites in India (such as the Indus Valley Civilization) has confirmed the presence of ancient grains like wheat, barley, and rice.
Maize $(Zea \, mays)$ is a crop of New World origin (Americas).
It was introduced to India by the Portuguese in the $16^{th}$ century.
Therefore, it has never been found in ancient archaeological excavations in India.

(D) Maize $(Zea \ mays)$ is native to the Americas (the New World).
It was not known to the rest of the world,including Europe,Asia,and Africa,until Christopher Columbus reached the Americas in $1492$.
Following this discovery,maize was introduced to other parts of the world by explorers and traders.
Therefore,it is absent from all ancient literature written before the $16^{th}$ century.

(C) $Curcuma$ $domestica$ (Turmeric) is widely known for its yellow pigment, curcumin, which is used as a dye and as a medicinal herb for its anti-inflammatory and antiseptic properties.
$Butea$ $monosperma$ (Flame of the Forest) produces yellow to orange-red flowers that are traditionally used to extract a yellow dye, and various parts of the plant are used in traditional medicine for treating various ailments.
Therefore, both plants are used for these purposes.

(B) The common name 'Snow rose' refers to plants of the genus $Rhododendron$.
Specifically,certain alpine species of $Rhododendron$ are colloquially known as snow roses due to their growth in high-altitude,snowy environments.
Therefore,the correct option is $B$.

(A) The plant $Asparagus$ $racemosus$, commonly known as $Shatavari$, is widely used in traditional medicine (Ayurveda) for its aphrodisiac properties and is specifically used to treat sexual disorders, including impotence.
$Acacia$ $arabica$ is primarily known for its medicinal properties related to skin diseases, diarrhea, and as an astringent, but it is not the primary source for treating impotence.
Therefore, the correct answer is $Asparagus$ $racemosus$.

(D) Polymyxin $B$ is a polypeptide antibiotic produced by the bacterium $Bacillus$ $polymyxa$.
Since $Bacillus$ $polymyxa$ is not listed in the options provided,the correct answer is $D$ (None of the above).

(C) The correct answer is $C$ (Indian madar).
$Indian$ $madar$ (scientific name: $Calotropis$ $procera$) is a medicinal plant.
Its roots and leaves are used in the form of a decoction to treat various ailments including jaundice,paralysis,urinary disorders,menstrual irregularities,and inflammatory conditions of the chest.