Presentation 1

What are the main characteristics of life

• Organized

• Made of Cells

• Metabolize

• Reproduce

• Respond

• DNA

What are the levels of organization

• Chemical

• Cellular

• Organismal

• Ecological

How are Chemicals organized

• Atoms

• Molecules

Types of Atoms

• Matter

• Elements

Types of Molecules

• Atomic Bonds

• Chemical Compounds

How are Cells Organized

• Organelles

• Cells

How is organismal level organized

• Tissue

• Organ

• Organ Systems

• Organism

How is ecological level organized

• Population

• Community

• Ecosystem

• Biosphere

Types of Cells

• Eukaryote

• Prokaryote

Eukaryote Qualities

• No Nucleus

• No Organelles

• Small

• Simple

• Bacteria

Prokaryote Qualities

• Nucleus

• Organelles

• Larger

• More Complex

• Animals, Plants, Fungi, Protists…

What is Metabolism

All the life-sustaining chemical reactions that occur within an organism's cells to convert food into energy

Catabolsim

Process that breaks down complex, big molecules into smaller ones, yielding energy

Anabolsim

Process by which the body utilizes the energy released by catabolism to synthesize complex molecules

Types of Asexual Reproduction

• Cell Division

• Fragmentation (Sponges)

• Runners (Strawberries)

What is Asexual reproduction

Sexual reproduction that involves one organism and results in an identical product (organism)

What is the official term for fertilization

Syngamy

What is a Gamete

Sex cell or egg and sperm cells

What is a zygote

Product of sexual reproduction

Why is sexual reproduction unique from asexual reproduction

Makes genetic variation in zygote (Genes from both parents)

What do all living things respond to

• External environment

• Internal environment

What is Homeostasis

Maintenance of a constant internal environment (Ex. Temperature Control)

What do all livings things contain

DNA

What is DNA

Long thread-like molecule found in every cell in an organism

What does DNA determine

• Looks of an organism

• Functions of an organism

• Behavior of an organism

What letters are in the genetic alphabet

A C T G

What is a gene

A sequence of DNA that codes for a protein

Steps in the Scientific Method

• Observe

• Question

• Hypothesis

• Experiment

• Conclusion

What is a theory

A conclusive restatement of the hypothesis

What must happen when a test invalidates a hypothesis

Hypothesis must be modified or testing methods must be modified

Two ways to test a hypothesis

• Experimentation

• Observation

What makes a scientific law

Exhaustively tested theory that is proven to be completely true [Gravity]

What is a theory

Statement of relative fact, not truth