Nature and Scope of Biology Questions in English

(C) The term "biology" was coined and introduced independently by Jean-Baptiste Lamarck and Gottfried Reinhold Treviranus in the year $1802$.
They used this term to describe the study of living organisms.

(B) Aristotle is known as the 'Father of Biology' because of his extensive contributions to the study of living organisms,including his detailed observations and classifications of animals.
He laid the foundation for biological sciences by documenting the characteristics and behaviors of various species.

(A) Aristotle is known as the 'Father of Zoology' because he was the first to classify animals based on their characteristics and provided detailed observations on their anatomy and behavior in his work 'Historia Animalium'.

(C) Aristotle,often referred to as the father of biology,wrote the famous book titled $Historia \ Animalium$.
In this work,he classified animals based on their characteristics and habitats,laying the foundation for zoology.

(C) Theophrastus is known as the 'Father of Botany'.
He was a Greek philosopher and a student of Aristotle.
He wrote the famous book 'Historia Plantarum',in which he described and classified many plants.

(A) The book "Philosophie Zoologique" was published in $1809$ by the French naturalist Jean-Baptiste Lamarck.
In this work, Lamarck proposed his theory of evolution, commonly known as the Theory of Inheritance of Acquired Characters or Lamarckism.
Therefore, the correct option is $A$.

(A) The system of binomial nomenclature was introduced by $Carl$ $Linnaeus$.
He proposed this system in his book $Species$ $Plantarum$ $(1753)$.
According to this system,each organism is given a scientific name consisting of two components: the genus and the specific epithet.

(C) Carl Linnaeus introduced the system of binomial nomenclature in his book $Species \ Plantarum$,published in $1753$.
This book provided the scientific names for all plant species known at that time.
While $Systema \ Naturae$ is also a famous work by Linnaeus,$Species \ Plantarum$ is specifically recognized for the first consistent application of binomial nomenclature for plants.

(B) The book 'Systema Naturae' is one of the most significant works in the history of biological taxonomy.
It was written by the Swedish botanist,zoologist,and physician $Carl \ Linnaeus$.
In this work,he laid the foundations for the modern binomial nomenclature system used to classify living organisms.

(B) The 'three kingdom system' of classification was proposed by Ernst Haeckel in $1866$.
He introduced a third kingdom,Protista,to include all unicellular organisms such as protozoa,algae,and fungi,in addition to the existing kingdoms Plantae and Animalia.

(D) Antony van Leeuwenhoek was the first person to observe bacteria and protozoa in $1675$. He used his self-designed simple microscope to examine samples of rainwater,saliva,and plaque from his teeth. He referred to these microscopic organisms as 'animalcules'.

(B) The famous essay titled 'Nothing in Biology Makes Sense Except in the Light of Evolution' was published in $1973$ by the geneticist and evolutionary biologist Theodosius Dobzhansky.
In this essay,he argued that the principles of evolution are essential for understanding all biological phenomena,as they provide the unifying framework for the diversity of life.

(B) The correct answer is $B$.
Louis Pasteur performed the swan-necked flask experiment to disprove the theory of spontaneous generation.
He used flasks with long,curved necks that allowed air to enter but trapped dust particles and microorganisms in the bend.
As a result,the broth inside remained sterile,proving that life arises only from pre-existing life.

(D) The theory of spontaneous generation,also known as abiogenesis,proposed that living organisms could arise spontaneously from non-living matter.
Louis Pasteur conducted a series of experiments using swan-necked flasks to demonstrate that microorganisms only arise from pre-existing microorganisms.
By boiling nutrient broth in these flasks,he showed that no life appeared in the broth as long as the neck remained intact,preventing dust and microbes from entering.
This experiment successfully disproved the theory of spontaneous generation and supported the concept of biogenesis.

(D) In $1953$,Stanley Miller and Harold Urey conducted a famous experiment to test the Oparin-Haldane hypothesis.
They created a laboratory environment simulating the conditions of the primitive Earth,using a mixture of methane $(CH_4)$,ammonia $(NH_3)$,hydrogen $(H_2)$,and water vapor $(H_2O)$ in a closed apparatus.
By applying electric discharges to simulate lightning,they observed the formation of simple organic compounds,specifically amino acids like glycine,alanine,and aspartic acid.
This experiment provided experimental evidence that life's building blocks could arise from non-living inorganic matter,supporting the theory of chemical evolution.

(D) The correct answer is $(d)$.
In $1953$,Stanley Miller and Harold Urey experimentally demonstrated the conditions of the primitive Earth.
They created a closed system simulating the primitive atmosphere,which consisted of methane $(CH_4)$,ammonia $(NH_3)$,water vapor $(H_2O)$,hydrogen $(H_2)$,and some carbon monoxide $(CO)$ and carbon dioxide $(CO_2)$.
This setup was a reducing atmosphere,and they successfully synthesized amino acids,proving that organic molecules could be formed from inorganic precursors under these conditions.

(C) Wendell $M.$ $Stanley$ was the first scientist to crystallize a virus,specifically the Tobacco Mosaic Virus $(TMV)$,in $1935$.
This discovery demonstrated that viruses could be crystallized like chemical substances,which provided significant insight into their nature as non-living entities outside a host cell.
Therefore,the correct option is $C$.

(B) Renato $Dulbecco$ is the scientist credited with demonstrating that certain viruses can cause cancer.
He discovered that the genetic material of tumor viruses can integrate into the host cell's genome,leading to malignant transformation.
For this pioneering work in the field of tumor virology,he was awarded the Nobel Prize in Physiology or Medicine in $1975$.

(D) The statement 'Protoplasm is the physical basis of life' was proposed by $J. Huxley$ in $1868$.
$1$. $J. Huxley$ emphasized that all the vital activities of an organism are centered in the protoplasm,making it the fundamental material of life.
$2$. $Felix Dujardin$ first discovered protoplasm and called it 'sarcode'.
$3$. $Purkinje$ coined the term 'protoplasm' in $1839$.
$4$. $Max Schultze$ proposed the 'Protoplasm Theory',which states that the cell is a mass of protoplasm containing a nucleus.

(C) The term 'cell' was first coined by the English microscopist $Robert \ Hooke$ in $1665$.
He observed thin slices of cork under a primitive microscope and noticed small,box-like structures which he termed as 'cells' (Latin for 'small room').

(A) The cell nucleus was discovered by Robert Brown in $1831$.
He observed a small,rounded body within the cells of orchid roots and termed it as the nucleus.

(D) The cell theory was proposed by two German biologists: Matthias Schleiden,a botanist $(1838)$,and Theodor Schwann,a zoologist $(1839)$.
They collectively formulated the cell theory,which states that all living organisms are composed of cells and products of cells.

(B) The correct answer is $B$.
In $1855$,the German physiologist Rudolf Virchow expanded the cell theory by adding a third principle.
He stated that all cells arise from the division of pre-existing cells,famously expressed by the Latin phrase 'omnis cellula-e cellula'.

(A) Lysosomes were discovered by the Belgian cytologist $Christian$ $\text{de Duve}$ in the early $1950s$.
He identified these organelles while studying the metabolic processes of liver cells.
For this significant discovery, he was awarded the Nobel Prize in Physiology or Medicine in $1974$.

(B) Gregor Johann Mendel is known as the 'Father of Genetics'.
He performed pioneering experiments on pea plants ($Pisum$ $sativum$) to understand the principles of inheritance.
His work laid the foundation for modern genetics,making him the first great geneticist.

(C) Gregor Johann Mendel is known as the 'Father of Genetics'.
He conducted hybridization experiments on garden peas $(Pisum \text{ } sativum)$ for seven years $(1856-1863)$.
Based on his experiments, he proposed the fundamental laws of inheritance, which are known as Mendel's Laws of Inheritance (Law of Dominance, Law of Segregation, and Law of Independent Assortment).

(C) The term 'Genetics' was coined by the English biologist $William \text{ } Bateson$ in $1905$ to describe the study of heredity and variation.
$William \text{ } Harvey$ is known for his work on blood circulation.
$Johannsen$ coined the terms 'gene','genotype',and 'phenotype'.
$Hugo \text{ } de \text{ } Vries$ is known for his mutation theory.

(B) The determination of sex-linked genes was first made by $T.H. Morgan$ in $1910$.
He observed the inheritance pattern of the white-eye mutation in $Drosophila$ $melanogaster$ (fruit fly).
His experiments provided the first clear evidence that genes are located on chromosomes and that specific traits can be linked to the sex chromosomes.

(C) Linkage was first observed by $William$ $Bateson$ and $Reginald$ $Punnett$ in $1906$ while working on the sweet pea plant $(Lathyrus$ $odoratus)$.
They observed that the genes for flower color and pollen shape did not show independent assortment, which led to the discovery of the phenomenon of linkage.
Although $Thomas$ $Hunt$ $Morgan$ later provided the chromosomal basis of linkage and performed extensive work on $Drosophila$, the initial observation was made by $Bateson$ and $Punnett$.

(B) The 'One gene one enzyme hypothesis' was proposed by George Beadle and Edward Tatum in $1941$ (awarded Nobel Prize in $1958$).
This hypothesis was based on their experiments with nutritional mutations in the pink bread mold, $Neurospora crassa$.
They demonstrated that specific genes are responsible for the production of specific enzymes, which catalyze metabolic reactions.

(A) $H.J. Muller$ was awarded the Nobel Prize in Physiology or Medicine in $1946$ for his discovery that mutations can be induced by $X$-rays.
He demonstrated that $X$-rays have a mutagenic effect on the genetic material of organisms, specifically using $Drosophila$ $melanogaster$ as his model organism.
This discovery provided a powerful tool for genetic research and significantly advanced our understanding of the nature of mutations.

(C) Barbara McClintock is a renowned geneticist who was awarded the Nobel Prize for her discovery of mobile genetic elements,commonly known as 'jumping genes' or transposons.
She conducted her pioneering research on $Zea \ mays$,which is commonly known as $Maize$ (corn).
Her work demonstrated that genetic elements could move within the genome,which fundamentally changed our understanding of genetics.

(A) Karl Landsteiner is the scientist who discovered and studied human blood groups in $1900$.
He identified the $ABO$ blood group system,which revolutionized the field of blood transfusion and immunology.
For this monumental discovery,he was awarded the Nobel Prize in Physiology or Medicine in $1930$.

(C) The transformation experiment was conducted by Frederick $Griffith$ in $1928$ using the bacterium $Streptococcus$ $pneumoniae$.
He observed that a non-virulent strain of bacteria could be transformed into a virulent strain when mixed with heat-killed virulent bacteria.
This experiment provided the first evidence that genetic material could be transferred between organisms.

(B) The phenomenon of bacterial transformation was first described by Frederick Griffith in $1928$.
However,the biochemical nature of the 'transforming principle' was determined by Oswald Avery,Colin MacLeod,and Maclyn McCarty (Avery et al.) in $1944$.
They demonstrated that $DNA$ is the genetic material responsible for transformation in bacteria.

(D) The chemical nature of the gene was determined by the experiments of $Oswald \ Avery$,$Colin \ MacLeod$,and $Maclyn \ McCarty$ in $1944$.
They purified biochemicals (proteins,$DNA$,$RNA$) from the heat-killed $S$ strain of $Streptococcus \ pneumoniae$ to see which one could transform live $R$ strain cells into $S$ strain cells.
They discovered that $DNA$ alone caused the transformation,proving that $DNA$ is the genetic material.

(A) In $1953$,James Watson and Francis Crick proposed the double helical model of $DNA$ based on $X$-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin.
This model describes $DNA$ as a double helix with two antiparallel strands held together by hydrogen bonds between complementary nitrogenous bases.
Therefore,the correct answer is Watson and Crick.

(C) The semiconservative nature of $DNA$ replication was first experimentally demonstrated by Matthew Meselson and Franklin Stahl in $1958$.
They used $E. coli$ bacteria and grew them in a medium containing heavy nitrogen isotope $^{15}N$ for several generations.
Then,they transferred the cells to a medium containing normal nitrogen isotope $^{14}N$.
By using cesium chloride $(CsCl)$ density gradient centrifugation,they observed that the $DNA$ molecules had an intermediate density,which confirmed that each new $DNA$ molecule consists of one old strand and one newly synthesized strand.

(B) The enzyme $DNA$ polymerase $I$ was first isolated and characterized by Arthur Kornberg in $1956$. For this discovery,he was awarded the Nobel Prize in Physiology or Medicine in $1959$. This enzyme plays a crucial role in the replication of $DNA$ by catalyzing the addition of deoxyribonucleotides to the $3'$ end of a growing $DNA$ strand.

(B) Severo Ochoa was awarded the Nobel Prize in Physiology or Medicine in $1959$ for his discovery of the mechanisms in the biological synthesis of ribonucleic acid $(RNA)$ and deoxyribonucleic acid $(DNA)$.
Specifically,he discovered the enzyme polynucleotide phosphorylase,which allowed for the in vitro synthesis of polyribonucleotides.

(A) The first mammal clone, a sheep named "Dolly", was created by Ian Wilmut and his colleagues at the Roslin Institute in Edinburgh, $U.K.$, in February $1997$.
This was a landmark achievement in biotechnology as it demonstrated that a somatic cell from an adult animal could be used to create a genetically identical clone.

(B) The correct answer is $B$.
"Dolly" the sheep was created using the technique of somatic cell nuclear transfer $(SCNT)$.
In this process, the nucleus from a somatic cell (udder cell) of a donor sheep was extracted and transferred into an enucleated egg cell (an egg cell from which the nucleus had been removed) of another sheep.
This reconstructed egg was then implanted into a surrogate mother, resulting in the birth of "Dolly", a genetic clone of the donor sheep.

(C) Dolly the sheep was the first mammal to be cloned from an adult somatic cell using the process of nuclear transfer. This landmark scientific achievement occurred in $1996$ at the Roslin Institute in Scotland. Therefore,the correct option is $C$.

(B) The term 'ecology' (derived from the Greek words $oikos$ meaning 'house' or 'dwelling' and $logos$ meaning 'study of') was coined by the German biologist Ernst Haeckel in $1866$. He defined it as the study of the relationship of an organism to its environment.

(C) The term 'ecosystem' was coined by the British ecologist $A.G. Tansley$ in $1935$.
He defined the ecosystem as a community of living organisms in conjunction with the non-living components of their environment,interacting as a system.

(C) The $10\%$ law of energy transfer was proposed by Raymond Lindeman in $1942$.
This law states that during the transfer of energy from one trophic level to the next,only about $10\%$ of the energy is stored as biomass,while the remaining $90\%$ is lost as heat or used for metabolic activities.

(A) The 'Law of Limiting Factors' was proposed by $F.F. Blackman$ in $1905$.
According to this law,if a physiological process is controlled by several factors,the rate of the process is limited by the factor that is present in the least amount relative to its optimum requirement.
This is a fundamental concept in the study of photosynthesis.

(A) The theory of use and disuse,also known as the Inheritance of Acquired Characters,was proposed by Jean-Baptiste Lamarck.
According to this theory,organs that are used frequently become stronger and better developed,while those that are not used gradually degenerate and disappear over generations.

(C) The Pangenesis hypothesis was proposed by Charles $Darwin$ in $1868$ in his book 'The Variation of Animals and Plants under Domestication'.
According to this hypothesis,every part of the body produces minute particles called 'gemmules' or 'pangenes',which travel through the blood to the reproductive organs and are passed on to the offspring,thereby explaining the inheritance of acquired characters.