Another Unit 1 Review

What are the 7 characteristics of life? (Memory trick: "Oh My Gosh! Really? Help Everyone!")

Organization, Metabolism, Growth/Development, Reproduction, Response to stimuli, Homeostasis, Evolution. These characteristics define living organisms, illustrating how they function and interact with their environment.

What distinguishes metabolism in living vs non-living things?

Living things have organized, self-sustaining chemical reactions that convert nutrients to energy for life processes.

List biological organization levels from smallest to largest (11 levels)

Atom → Molecule → Cell → Tissue → Organ → Organ System → Organism → Population → Community → Ecosystem → Biosphere

At what level do properties of life first emerge?

Cell level - cells are the basic unit of life

What are the 5 biosphere organization levels?

Population → Community → Ecosystem → Biome → Biosphere

What are the 4 most abundant elements in living organisms? (CHON)

Carbon, Hydrogen, Oxygen, Nitrogen

How do autotrophs vs heterotrophs get energy?

Autotrophs: make their own food (photosynthesis); Heterotrophs: consume other organisms

Define homeostasis and why it's crucial

Maintaining stable internal conditions despite external changes; essential for cellular function and survival

Difference between positive and negative feedback?

Negative: reverses change (most common); Positive: amplifies change (rare, like childbirth)

Asexual vs sexual reproduction difference?

Asexual: 1 parent, identical offspring; Sexual: 2 parents, genetic variation

What are the 3 Domains of Life?

Bacteria, Archaea, Eukarya