Q.What are the books written by Parasara?

Mendel is the Father of Genetics because his experiments on the garden pea first revealed the basic laws by which characters are inherited from parents to offspring.

Gregor Johann Mendel (1822-1884) carried out planned hybridisation experiments on the garden pea (Pisum sativum) over several years. His work was scientific and pioneering for the following reasons:

1. He selected clearly contrasting, easily observable characters (e.g. tall vs dwarf, round vs wrinkled seeds).
2. He used pure-breeding lines and made controlled crosses, following the characters over successive generations.
3. He counted and analysed the offspring in large numbers, applying mathematics/statistics to biology for the first time.
4. From his results he proposed the concept of hereditary 'factors' (now called genes) and framed the laws of inheritance - the Law of Dominance, the Law of Segregation, and the Law of Independent Assortment.

Because these laws became the basis of the entire science of genetics, Mendel is honoured as the Father of Genetics.

Mendel is the father of Genetics because he discovered the basic laws of inheritance through careful, statistically-analysed breeding experiments on garden pea.

Gregor Johann Mendel carried out planned hybridization experiments on garden pea (Pisum sativum) for about seven years.

• He selected pea because of its clear contrasting characters, short life span and self-pollinating nature.

• He studied inheritance of characters one at a time (monohybrid) and two at a time (dihybrid), and analysed the offspring numerically (applying statistics to biology for the first time).

• From his results he proposed the Law of Dominance, the Law of Segregation (purity of gametes) and the Law of Independent Assortment.

• These laws explained how factors (genes) are transmitted from one generation to the next and became the foundation of modern genetics.

Herbalists were early practitioners of medicine who possessed practical knowledge of local medicinal plants, and their accumulated knowledge was documented in reference books known as Materia Medica.

Before modern pharmacology, communities everywhere relied on local practitioners who knew which plants around them could treat particular ailments. Such practitioners, called Herbalists, learnt this knowledge largely through experience and oral tradition passed down generations.

• Their practical knowledge of medicinal plants was eventually compiled and written down.

• These written compilations, describing plants and their medicinal uses, are called Materia Medica.

• This tradition forms part of the historical roots of taxonomy — early classification of plants was often driven by their economic/medicinal usefulness rather than strict scientific relationships.

Mendel earned the title "father of Genetics" by being the first to work out the laws of inheritance through careful, statistically-analysed breeding experiments on garden pea.

Gregor Johann Mendel (1822-1884), an Austrian monk, carried out planned hybridization experiments on the garden pea (Pisum sativum) for about seven years.

Why he is honoured as the father of Genetics:

• He chose pea because it has clear-cut contrasting characters (tall/dwarf, round/wrinkled seeds etc.), a short life cycle and is naturally self-pollinating.

• He studied one character at a time (monohybrid) and two characters together (dihybrid), and counted the offspring, applying mathematics/statistics to biology for the first time.

• From his results he proposed the fundamental principles of heredity - the Law of Dominance, the Law of Segregation (purity of gametes) and the Law of Independent Assortment.

• These laws explained how characters (factors, now called genes) are transmitted from parents to offspring, laying the foundation of modern genetics.

Parashara, an ancient Indian scholar, authored the Vrikshayurveda ('the science of plant life'), among the earliest known systematic treatments of plants in Indian tradition.

Books written by Parashara: The chief work attributed to Parashara is the Vrikshayurveda (literally, 'the Ayurveda/science of trees and plants'), believed to date to around the early centuries CE. He is regarded as one of the earliest Indian plant scientists/taxonomists.

Important aspects discussed:

• A classification of plants into major groups based on external (morphological) features — broad categories resembling what we would now call natural groupings, such as trees (Vriksha), shrubs (Gulma), creepers/climbers (Lata), grasses, etc.

• Descriptions of plant structure/anatomy, including roots, stems, leaves and flowers.

• Notes on plant cultivation practices — soil requirements, seed treatment, irrigation, and manuring.

• Observations on plant diseases and their treatment/remedies.

• Early recognition of plant families showing similar characteristics, an approach that anticipates natural classification systems developed centuries later in the West.

'Botany' derives from the Greek 'botane' (pasture/fodder plant), reflecting the earliest human interest in plants as animal feed, and later evolved through Latin/French into the modern English term.

The term Botany traces back to the Greek word 'botane', meaning 'pasture', 'grass', or 'fodder'. In very early human history, before agriculture and medicine developed as separate concerns, people's practical interest in plants was chiefly as grazing material for their animals and as herbs.

From 'botane' came the Greek adjective 'botanikos' (relating to herbs/plants), which passed into Latin as 'botanicus' and then into French as 'botanique'. The English word 'Botany' developed from this French form. Over time, as the scientific study of plant life — structure, classification, physiology, reproduction, and economic uses — expanded far beyond fodder plants, 'Botany' came to mean the entire branch of biology dealing with the study of plants.

Theophrastus is called the Father of Botany; his best-known book is Historia Plantarum ("Enquiry into Plants").

Botany, the scientific study of plants, has a long recorded history. Among the earliest scholars to study plants systematically was Theophrastus (c. 372–287 BCE), a Greek philosopher and a student of Aristotle.

Because he was the first to describe, name and classify a large number of plants and to record their form, structure, habits and uses in an organised way, he is honoured as the "Father of Botany."

His most celebrated botanical work is Historia Plantarum (Latin for "Enquiry into Plants"), in which he described about 480 kinds of plants. He also wrote De Causis Plantarum ("The Causes of Plants"). This foundational plant knowledge is the same basis carried into the modern TS Intermediate botany syllabus, which follows the NCERT/CBSE curriculum framework studied nationwide.