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Flashcards in Lecture 1 Deck (14):
1

biology

The scientific study of life

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cell theory

1. all living things have cells 2. cells are basic building blocks of organisms 3. all cells come from other cells Note: Robert Hook discovered cork cells Leeuwenhook discovered blood and sperm cells Schleiden & Schwann - All living things have cell

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Domain

A taxonomic category above the kingdom level. The 3 domains are Archaea, Bacteria, and Eukarya

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Bacteria

One of two prokaryotic domains. The other being Eukarya

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Archaea

One of two prokaryotic domains. The other being Bacteria. -Most live in extreme environments -Halophiles : Salty Lakes -Thermophiles: Hot Springs

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Eukarya

Domain that included all eukaryotic organisms

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eukaryote

Eukaryotic cell. More complex than prokaryote. Has organelles. Plant and animal cells.

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evolution

Descent with modification; the idea that living species are descendants of ancestral species that were different from the present-day ones. Also defined more narrowly as the change in the genetic composition of a population from generation to generation. -Core theme of Biology -Natural Selection -Based on adaptations

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hierarchy of biological organization

Biological organization based on structural hierarchy of life, from molecules to ecosystems. -Ecosystem -Community -Population -Organism -Organ Systems -Organs -Tissues -Cells -Molecules Note: The atom is at the lowest level (chemical building block of all life)

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natural selection

The editing mechanism in evolution

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prokaryote

Simpler than Eukaryote. No membrane bound nucleus. Loose DNA matter

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reductionism

Reducing something complex to study the simpler components. Note: The problem with reductionism is that you can't fully understand the function of something if all you see is it's parts.

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science

A process of inquiry that includes repeatable observations and testable hypotheses. -Latin: to know

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steps of the scientific method

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