Lesson Overview 1.3 Studying Life.

Slides:



Advertisements
Similar presentations
1.3 Characteristics of Life
Advertisements

Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
Lesson Overview 1.3 Studying Life.
Yeast Lab!. What makes something living? Consider the following questions… How big/complex must something be? What must it be able to do? Where must it.
Introduction to Biology Estimated 5-30 million species Only 2 million have been identified Only a few thousand have been studied Believed that life arose.
Lesson Overview 1.3 Studying Life.
Copyright Pearson Prentice Hall
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
What characteristics do all living things share? -KNOW!
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
End Show Slide 1 of 45 Copyright Pearson Prentice Hall 1-3 Studying Life.
Introduction to Biology
Lesson Overview Lesson Overview Studying Life Bell Ringer What is the difference between a hypothesis and a scientific theory? ____________________________________________.
What is Biology? Chapter 1. –Where did plants and animals come from? – How did I come to be? –Humans have tried to answer these questions in different.
 What are the goals of science? ◦ To provide natural explanations for events in the natural world ◦ To use those explanations to understand patterns.
Yeast Lab!. What makes something living? Consider the following questions… How big/complex must something be? What must it be able to do? Where must it.
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
Studying Life Vodcast 1.3 Unit 1: Introduction to Biology.
WHAT IS SCIENCE? WHAT IS SCIENCE? An organized way of gathering and analyzing evidence about the natural world.
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
Lesson Overview Lesson Overview Studying Life 1.3 Studying Life.
Studying Life Section 1.3.
Slide 1 of 45 Copyright Pearson Prentice Hall Biology.
Introduction to Biology Chapter 1 August 26, 2015.
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
Characteristics of Living Things What characteristics do all living things share? Living things are made up of basic units called cells are based on a.
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
Lesson Overview Lesson Overview Studying Life I you some questions.
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life.
INTRODUCTION TO BIOLOGY Mrs. Stoops ASHN Spring 2015.
Lesson Overview Lesson Overview What Is Science? Chapter 1 The Science of Biology.
End Show Slide 1 of 45 Copyright Pearson Prentice Hall 1-3 Studying Life.
Lesson Overview Lesson Overview Studying Life Lesson Overview 1.3 Studying Life Think about important news stories you’ve heard. Bird flu spreads around.
Chapter 1, Section 3: Studying Life. Characteristics of Living Things A universal genetic code Grow and develop stimuli Respond to stimuli in their environment.
Lesson Overview 1.3 Studying Life.
The Greek word bios means “life,” and -logy means “study of.”
Lesson Overview 1.3 Studying Life.
Lesson Overview 1.3 Studying Life.
Notes Chapter 1.3 Studying Life.
Studying Life Ms. Drumonde
Vocabulary Tuesday Wednesday Biology Metabolism DNA
Lesson Overview 1.3 Studying Life.
Lesson Overview 1.3 Studying Life.
Created by Lynn Collins (April, 2013)
Copyright Pearson Prentice Hall
Copyright Pearson Prentice Hall
Outline 1-3 Studying Life
Lesson Overview 1.3 Studying Life.
Lesson Overview 1.3 Studying Life.
Chapter 1.3 – Studying Life
Goals of science: To investigate and understand the natural world
Characteristics of Living Things
Characteristics of Living Things
Biology & The Characteristics of Life
Lesson Overview 1.3 Studying Life.
Lesson Overview 1.3 Studying Life.
What Science Is and Is Not
Lesson Overview 1.3 Studying Life.
Lesson Overview 1.3 Studying Life.
Lesson Overview 1.3 Studying Life.
Copyright Pearson Prentice Hall
1.3 Studying Life p17.
Lesson Overview 1.3 Studying Life.
Lesson Overview 1.3 Studying Life.
Characteristics of Life
Characteristics of Living Things
Copyright Pearson Prentice Hall
Presentation transcript:

Lesson Overview 1.3 Studying Life

THINK ABOUT IT Think about important news stories you’ve heard. Bird flu spreads around the world, killing birds and threatening a human epidemic. Users of certain illegal drugs experience permanent damage to their brains and nervous systems. Reports surface about efforts to clone human cells. These and many other stories involve biology—the science that employs scientific methodology to study living things. The Greek word bios means “life,” and -logy means “study of.”

Characteristics of Living Things What characteristics do all living things share? Living things are made up of basic units called cells, are based on a universal genetic code, obtain and use materials and energy, grow and develop, reproduce, respond to their environment, maintain a stable internal environment, and change over time.

Characteristics of Living Things Biology is the study of life. But what is life? No single characteristic is enough to describe a living thing. Also, some nonliving things share one or more traits with organisms. Some things, such as viruses, exist at the border between organisms and nonliving things.

Characteristics of Living Things Living things are based on a universal genetic code. All organisms store the complex information they need to live, grow, and reproduce in a genetic code written in a molecule called DNA. That information is copied and passed from parent to offspring and is almost identical in every organism on Earth.

Characteristics of Living Things Living things grow and develop. During development, a single fertilized egg divides again and again. As these cells divide, they differentiate, which means they begin to look different from one another and to perform different functions.

Characteristics of Living Things Living things respond to their environment. A stimulus is a signal to which an organism responds. For example, some plants can produce unsavory chemicals to ward off caterpillars that feed on their leaves.

Characteristics of Living Things Living things reproduce, which means that they produce new similar organisms. Most plants and animals engage in sexual reproduction, in which cells from two parents unite to form the first cell of a new organism. Other organisms reproduce through asexual reproduction, in which a single organism produces offspring identical to itself.

Characteristics of Living Things Living things maintain a relatively stable internal environment, even when external conditions change dramatically. All living organisms expend energy to keep conditions inside their cells within certain limits. This conditionprocess is called homeostasis. For example, specialized cells help leaves regulate gases that enter and leave the plant.

Characteristics of Living Things Living things obtain and use material and energy to grow, develop, and reproduce. The combination of chemical reactions through which an organism builds up or breaks down materials is called metabolism. For example, leaves obtain energy from the sun and gases from the air. These materials then take part in various metabolic reactions within the leaves.

Characteristics of Living Things Living things are made up of one or more cells—the smallest units considered fully alive. Cells can grow, respond to their surroundings, and reproduce. Despite their small size, cells are complex and highly organized. For example, a single branch of a tree contains millions of cells.

Characteristics of Living Things Over generations, groups of organisms evolve, or change over time. Evolutionary change links all forms of life to a common origin more than 3.5 billion years ago.

Characteristics of Living Things Evidence of this shared history is found in all aspects of living and fossil organisms, from physical features to structures of proteins to sequences of information in DNA. For example, signs of one of the first land plants, Cooksonia, are preserved in rock over 400 million years old.

Big Ideas in Biology All biological sciences are tied together by “big ideas” that overlap and interlock with one another. Several of these big ideas overlap with the characteristics of life or the nature of science.

Big Ideas in Biology What are the central themes of biology? The study of biology revolves around several interlocking big ideas: The cellular basis of life; information and heredity; matter and energy; growth, development, and reproduction; homeostasis; evolution; structure and function; unity and diversity of life; interdependence in nature; and science as a way of knowing.

Science as a Way of Knowing The job of science is to use observations, questions, and experiments to explain the natural world in terms of natural forces and events. Successful scientific research reveals rules and patterns that can explain and predict at least some events in nature.

Science as a Way of Knowing Science enables us to take actions that affect events in the world around us. To make certain that scientific knowledge is used for the benefit of society, all of us must understand the nature of science.