Presentation on theme: "Everyone is a Biologist ! Today: Four Questions What are the Characteristics of Life? How diverse is life? How do we study the natural world? Who are."— Presentation transcript:
Maintenance of Homeostasis Homeostasis - the ability of an organism to maintain its internal environment despite conditions in the external environment. Human body temperature is……… F if body temperature rises, you sweat. F if body temperature lowers, you shiver.
What are the Characteristics of Life? Reproduction, Growth & Development Asexual reproduction - involves a single parent; progeny are genetically identical to the parent. Sexual reproduction - involves 2 parents; progeny are genetically diverse. Is it essential for an individual to reproduce?
What are the Characteristics of Life? Irritability & Adaptation Irritability - immediate response to a stimulus.
What are the Characteristics of Life? Irritability & Adaptation Adaptation - an inherited behavior or characteristic that enables an organism to survive & reproduce. Over time, adaptations are modified by natural selection.
What are the Characteristics of Life? Life is always changing….. On the level of DNA…… Change = Evolution Evolution is the backbone of biology.
Life is Diverse Biodiversity refers to the many different types of organisms on earth. Taxonomy is the biological science that classifies life according to evolutionary relationships. The Domain is the largest group of organisms.
After you perform your experiment, you need to analyze the generated data. Does the data support or not support your hypothesis? If your data does not support the hypothesis then…… If your data does support your hypothesis……..
How do we study the Natural World? What is difference between hypothesis, theory & law? Hypothesis - “an educated guess”; a tentative explanation of phenomena. Theory - a widely accepted explanation of natural phenomena; has stood up to thorough & continual testing. Law - a statement of what always occurs under certain conditions.
How do we study the Natural World? How is a control group different from an experimental group?