1 1 what is life science

What is life science?Shenghua Yao

What is science?About science: The word “science” comes from the Latin "scientia," meaning knowledge.Science is an organized collection of knowledge about the world.Science is a way of finding out why things happen as they do.A practitioner of science is known as a scientist.Science knowledge is based on testing and observations.

How is science studied?

Begins with observations about our surroundings.

Next, ask questions about the phenomenon we are observing.

Followed by generating a hypothesis. Tentative explanation to the

question.

Testing: Scientists perform tests to determine the

accuracy of their hypothesis.

Explanation It is a hypothesis that has passed the

widest and most comprehensive series of tests.

theory = well demonstrated principle.

Branches of science

What is life science?

The scientific study of the areas of science that deal with living things is called life science.

Branches of life science

anatomy

physiology

study of the parts of the body

study of how the whole body functions

Branches of life science

ZoologyZoologists study animals. Marine biologist and veterinarian are two of the careers in zoology.

BotanyBotanists study plants. Some careers in botany are plant geneticist and horticulturalist.

Branches of life science

MicrobiologyMicrobiologists study viruses and very small living things. Two careers in microbiology are cell biologist and epidemiologist.

EcologyEcologists study the way living things interact with their environment. Park ranger and environmentalist are careers in ecology.

Branches of life science

genetics; molecular biology; cell biology; developmental biology; evolution; toxicology, etc.

interdisciplines:bioinformatics; biophysics; structural biology, etc.

Which subject do you want to

study?People choose specific subjects to study and this is called specialization.A person who studies or works in one part of a subject is called a specialist.

Why study life science?

Life science affects our life in many ways. Medical advances Addressing needs of growing human

population Challenges of decreasing rate of biodiversity

Biotechnology advances

Medical advancesPenicillin is a group of antibiotics derived from Penicillium fungi.

Alexander Fleming, a bacteriologist who is credited with discovering penicillin in 1928.

Penicillium fungi could secrete penicillin which is a substance with antibiotic properties.

Medical advancesLife science is closely connected to modern medicine.

The medicine for acne.

The causes and warning signs of cancers are learned from scientific research.

Doctors can perform operations because they know about the parts of body and how they work.

Addressing needs of growing human population

The Facts:More than 7 billion people currently inhabit the planet, compared to only 3 billion in 1967. Every year about 135 million people are born and 55 million people die, adding 80 million to our global population.

Population growth is a root cause of many environmental and social problems:

Over 1 billion people do not have enough food and safe drinking water.

Global warming is disrupting our ecosystems and threatening billions of people with dislocation.

Energy sources, from wood to oil, are becoming scarcer and harder to reach or extract.

Addressing needs of growing human population

food ecology

biotech brings new energy resources

Challenges of biodiversity

The quagga is an extinct subspecies of the plains zebra that lived in South Africa.

The Irish elk was one of the largest deer that ever lived. It stood about 2.1 metres tall at the shoulders carrying the largest antlers of any known cervid (a maximum of 3.65 m from tip to tip and weighing up to 40 kg)..

Challenges of biodiversity

baiji (a freshwater

dolphin)

giant panda

Sumatran tiger mouse lemurs

Save them!

Biotechnology advances

Yogurt is bacterial fermented milk with live active cultures. Those live active cultures are the good bacteria that increase the beneficial bacteria in our digestive tract and help boost immunity.

Some types of mold are used to make cheese. These molds are safe to eat.

Some wines must be made by these grapes which are infected by Botrytis Cinerea.

Thanks!