Ch1-Studying Life - 1 Studying Life 1 Studying Life 1.1...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Studying Life
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1 Studying Life 1.1 What Is Biology? 1.2 How Is All Life on Earth Related? 1.3 How Do Biologists Investigate Life? 1.4 How Does Biology Influence Public Policy?
Background image of page 2
1.1 What is Biology? Biology : the scientific study of living things Living things : all the organisms descended from a single-celled ancestor. Characteristics of living organisms : Consist of one or more cells Contain genetic information Use genetic information to reproduce themselves Are genetically related and have evolved
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1.1 What is Biology? Characteristics of living organisms: Can convert molecules from their environment into new biological molecules Can extract energy from the environment and use it to do biological work Can regulate their internal environment Evolution : a central theme Living systems evolve through differential survival and reproduction.
Background image of page 4
1.1 What is Biology? Unicellular organisms : a single cell carries out all the functions of life Multicellular organisms : made of many cells that are specialized for different functions The study of cells was made possible by the invention of the microscope. Figure 1.2 All Life Consists of Cells
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1.1 What is Biology? Cell Theory: Cells are the basic structural and physiological units of all living organisms . Cells are both distinct entities and building blocks of more complex organisms. (Schleiden and Schwann 1838)
Background image of page 6
1.1 What is Biology? Cell Theory: All cells come from preexisting cells . All cells are similar in chemical composition. Most of the chemical reactions of life occur within cells. Complete sets of genetic information are replicated and passed on during cell division.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Charles Darwin proposed that all living organisms are descended from common ancestors. Evolution
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 30

Ch1-Studying Life - 1 Studying Life 1 Studying Life 1.1...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online