life science essays

A wooden cabin on a grassy hill with a mountainous backdrop and cloudy sky in the distance.

Why it takes more than a lifetime to truly understand a single meadow

Abstract digital art of glowing, multicoloured clusters against a dark background, resembling molecules in space.

Groundbreaking visualisations show how the world of the nucleus gives rise to our own

A small animal curled up asleep on brown moss against a black background illuminated by a spotlight.

Could humans hibernate?

Hibernation allows many animals to time-travel from difficult times to plenty. Could humans learn how to do it too?

Vladyslav Vyazovskiy

A solitary figure walking up misty stairs toward an unclear building, creating a mysterious atmosphere.

Philosophy of science

The nature of natural laws

Physicists and philosophers today have formulated three opposing models that explain how laws work. Which is the best?

Mario Hubert

Photo of a person in a winter coat and beanie looking at a snow-covered town, with mountains in the background.

Earth science and climate

There’s a ‘climate bomb’ ticking beneath the Arctic ice. How can we prepare?

Drawing of Earth and the Moon in orbit with straight lines trailing off each on a white background with grey specks.

To change the way you see the Moon, view it from the Sun’s perspective

Painting of two anthropomorphic peacocks in 18th-century attire in front of a stately home surrounded by trees.

Beauty and aesthetics

Is beauty natural?

Charles Darwin was as fascinated by extravagant ornament in nature as Jane Austen was in culture. Did their explanations agree?

Abigail Tulenko

A sea turtle swimming underwater in clear turquoise water with sunlight shimmering on the surface.

Elusive but everywhere

A new theory argues that unseen ‘fields’ guide all goal-directed things in the Universe, from falling rocks to voyaging turtles

Daniel W McShea & Gunnar O Babcock

Illustration of a person reading a book with glowing hot air balloons and mountains emerging from the pages.

The city of wisdom

Don’t be intimidated by physics: it is made of stories and metaphors. Learn these and the field will open up to you

Jamie Zvirzdin

Aerial view of a coastal area at dusk with multiple streaks of red light travelling over water and land, illuminating the landscape.

Ecology and environmental sciences

GPS tracking reveals stunning insights into the patterns of migratory birds

Black and white photo of a vintage propeller aircraft flying in a clear sky.

The forces of chance

Social scientists cling to simple models of reality – with disastrous results. Instead they must embrace chaos theory

Brian Klaas

Photo of shattered glass with multiple cracks against a black background.

Philosophy of mind

Rage against the machine

For all the promise and dangers of AI, computers plainly can’t think. To think is to resist – something no machine does

Space exploration

The rarely told story of the fruit flies, primates and canines that preceded us in space

Photo of two grey birds on a rock by water, one standing and the other appearing to crash land into the rock, neck bent with wings raised; green reeds in background.

Life makes mistakes

Hens try to hatch golf balls, whales get beached. Getting things wrong seems to play a fundamental role in life on Earth

David S Oderberg

3D rendering of a green, abstract, textured structure resembling dense tangled fibres on a black background.

Neuroscience

This intricate map of a fruit fly brain could signal a revolution in neuroscience

Photo of a galaxy with a bright centre emitting a blue jet of energy against a background of numerous stars in space.

Stars behaving absurdly

For centuries, the only way in which to illuminate the mysteries of black holes was through the power of mathematics

Steve Nadis & Shing-Tung Yau

A man in yellow shorts floating on his back in a swimming pool, with dark lane markings and reflections in the water.

History of science

Forwards, not back

Medicine aims to return bodies to the state they were in before illness. But there’s a better way of thinking about health

Kate MacCord & Jane Maienschein

A DNA double helix with overlapping images: lined pages, the printed pages of an old book, and a painted portrait of a woman that is the Mona Lisa, all on a black background.

Computing and artificial intelligence

The ‘cloud’ requires heaps of energy to stay aloft. Could synthetic DNA be the answer?

Vintage advertising poster for ‘Cocaine Toothache Drops’ featuring two children playing happily, building a house from sticks, in front of a house with a wooden fence.

Subcultures

An undulating thrill

Once lauded as a wonder of the age, cocaine soon became the object of profound anxieties. What happened?

Douglas Small

Close-up photo of butterfly wing scales in shades of orange, pink, white and black arranged in a mosaic-like pattern.

Brilliant dots of colour form exquisite patterns in this close-up of butterfly wings

Black and white photo of a vintage race car numbered 6 speeding past blurred spectators emphasising motion and early motor racing.

Clock time contra lived time

Henri Bergson and Albert Einstein fundamentally disagreed about the nature of time and how it can be measured. Who was right?

Evan Thompson

A digital painting of abstract shapes and lines featuring colourful spheres with light trails against a wavy background.

Chasing ghost particles

Without the neutrino, the Universe might be an empty void. But this inscrutable particle isn’t giving up its secrets easily

Corey S Powell

A man and a woman smiling with their hands on the shoulders of a Neanderthal figure with long hair and a beard but in modern clothes.

Why it took a century to work out that humans interbred with Neanderthals

A kingfisher underwater catching a fish amid rising bubbles.

Problem-solving matter

Life is starting to look a lot less like an outcome of chemistry and physics, and more like a computational process

David C Krakauer & Chris Kempes

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LIFE SCIENCES ESSAYS GRADE 10-12

The document provides a clear structure on how to write the essays. This document has been created from information available from the internet and it is not meant for any business purposes (FREE SUPPLY) but to help South African Life sciences Learners by gathering all the important information together. Not for market purposes only meant at assisting the Learners with a simple clear alternative in the essay writing, With a compilation of essays from Grade 12-10. You have to read the essays with understanding and never try to memorize them, as that is never part of learning. We aimed at creating independent and innovative thinkers of the south African as non-profit organization. Sources 1. I’solezwe lesiXhosa, 17 September, 2015 page 11 2. Life Sciences Academics (Facebook page), DR Marian Ross 3. http://www.testtakingpa.com/study/ 4. South African Department Basic Education Exam question papers and memorandums available from WWW.dbe.gov.za 5. Mr. Chaple's Science Class Blog http://chaplescienceclass.blogspot.com/2017/09/dnastructure.html 6. Eastern Cape Department of Education https://www.ecexams.co.za/ExaminationPapers.htm

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Life Sciences have always been a fundamental area of science. The exponential increase in the quantity of scientific information and the rate, at which new discoveries are made, require very elaborate, interdisciplinary and up-to-date information and their understanding. This fourth edition of Life sciences, Fundamentals and practice includes extensive revisions of the previous edition. We have attempted to provide an extraordinarily large amount of information from the enormous and ever-growing field in an easily retrievable form. It is written in clear and concise language to enhance self-motivation and strategic learning skill of the students and empowering them with a mechanism to measure and analyze their abilities and the confidence of winning. We have given equal importance to text and illustrations. The fourth edition has a number of new figures to enhance understanding. At the same time, we avoid excess detail, which can obscure the main point of the figure. We have retained the design elements that have evolved through the previous editions to make the book easier to read. Sincere efforts have been made to support textual clarifications and explanations with the help of flow charts, figures and tables to make learning easy and convincing. The chapters have been supplemented with self-tests and questions so as to check one’s own level of understanding. Although the chapters of this book can be read independently of one another, they are arranged in a logical sequence. Each page is carefully laid out to place related text, figures and tables near one another, minimizing the need for page turning while reading a topic. I have given equal importance to text and illustrations as well. We hope you will find this book interesting, relevant and challenging.

Life Sciences have always been a fundamental area of science. The exponential increase in the quantity of scientific information and the rate, at which new discoveries are made, require very elaborate, interdisciplinary and up-to-date information and their understanding. This fourth edition of Life sciences, Fundamentals and practice includes extensive revisions of the previous edition. We have attempted to provide an extraordinarily large amount of information from the enormous and ever-growing field in an easily retrievable form. It is written in clear and concise language to enhance self-motivation and strategic learning skill of the students and empowering them with a mechanism to measure and analyze their abilities and the confidence of winning. We have given equal importance to text and illustrations. The fourth edition has a number of new figures to enhance understanding. At the same time, we avoid excess details, which can obscure the main point of the figure. We have retained the design elements that have evolved through the previous editions to make the book easier to read. Sincere efforts have been made to support textual clarifications and explanations with the help of flow charts, figures and tables to make learning easy and convincing. The chapters have been supplemented with self-tests and questions so as to check one’s own level of understanding. We hope you will find this book interesting, relevant and challenging.

By the end of the course, the learner should be able to: 1. communicate biological information in a precise, clear and logical manner 2. develop an understanding of interrelationships between plants and animals and between humans and their environment 3. apply the knowledge gained to improve and maintain the health of the individual, family and the community 4. relate and apply relevant biological knowledge and understanding to social and economic situations in rural and urban settings 5. observe and identify features of familiar and unfamiliar organisms, record the observations and make deductions about the functions of parts of organisms 6. develop positive attitudes and interest towards biology and the relevant practical skills 7. demonstrate resourcefulness, relevant technical skills and scientific thinking necessary for economic development 8. design and carry out experiments and projects that will enable them understand biological concepts 9. create awareness of the value of cooperation in solving problems 10. acquire a firm foundation of relevant knowledge, skills and attitudes for further education and for training in related scientific field.

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