1.1 The Study of Life TEKS 2A, 3D, 3F

The student is expected to:

2A know the definition of science and understand that it has limitations, as specified in subsection (b)(2) of this section; 3D evaluate the impact of scientific research on society and the environment; 3F research and describe the history of biology and contributions of scientists

1.1 The Study of Life TEKS 2A, 3D, 3F

KEY CONCEPT Biology is the study of all forms of life.

1.1 The Study of Life TEKS 2A, 3D, 3F

Earth is home to an incredible diversity of life. – The biosphere includes all living things and all

the places they are found.

biosphere = everywhere life exists

1.1 The Study of Life TEKS 2A, 3D, 3F

Earth is home to an incredible diversity of life. • Every part of the biosphere is connected with every

other part. • The biosphere includes many environments.

– land environments

1.1 The Study of Life TEKS 2A, 3D, 3F

The biosphere includes many environments.– saltwater and freshwater environments

– portions of the atmosphere

Tidepool Estuary

1.1 The Study of Life TEKS 2A, 3D, 3F

– Biodiversity generally increases from the poles to the equator.

– Biodiversity is greater in areas with consistently warm temperatures.

• Biodiversity is the variety of life.

Biodiversity is greater closer to the equator.

1.1 The Study of Life TEKS 2A, 3D, 3F

– Members of a species can interbreed to reproduce. – About 2 million different living species have been

identified.

• A species is one particular type of living thing.

1.1 The Study of Life TEKS 2A, 3D, 3F

Biology is the scientific study of all forms of life.– Biology, or life science, is the scientific study of living things

and their interactions with their environment.– Science is the knowledge obtained by observing natural

events and conditions in order to discover facts and formulate laws or principles that can be verified or tested.

1.1 The Study of Life TEKS 2A, 3D, 3F

Humans have studied living things throughout history.– Prehistoric cave paintings show that ancient

people were interested in the animals they observed and used as food.

– The first classification system for living things is attributed to the Greek philosopher Aristotle and dates back to 330 BCE.

1.1 The Study of Life TEKS 2A, 3D, 3F

Humans have studied living things throughout history.– Italian artist and scientist Leonardo da Vinci

began close studies of the anatomy of both animals and humans in the 1400–1500s.

– The Industrial Revolution, which began in the last half of the 18th century, brought about significant advances in travel, communication, and technology.