Flashcards in Test 1 Deck (36):
Six steps of scientific method
Observation, question, hypothesis, experiment, conclusion, report results
Relationship between two variables
Are hypothesis with broad application that are supported by MANY experiments
All organisms consist of one or more cells. The cell is the basic unit of life, and all cells arise from existing cells.
Change occurs in inherited traits of a population over generations.
All substances consist of atoms
Microorganisms cause many diseases.
What is biology
The scientific study of life
7 main characteristics of living organisms
Order, regulation, growth and development, energy utilization, response to environment, reproduction, evolution
Living things are complex and organized; not random
Living things maintain relatively constant internal conditions (HOMEOSTASIS)
Living things grow and develop.
Growth and development
Living things acquire and use material and energy; as a result of this they produce wast
Living things respond to stimuli
Response to environment
Living things have baby’s
POPULATIONS of living things have the capacity to evolve; NOT a trait of an individual
Scales of biological organization (10)
Biosphere, echo system, community, population, organism, organ system, organ, tissue, cell@ organelle, molecule and atom
The whole planet
Includes biotic and abiotic elements. Ex. Species conservation
Is a pure substance that can not be broken down by chemical means into any other substance.
96% of the human body is made up of these elements
C, H, O, and N
Is the smallest part of an element that retains the properties of that element.
Is an atom that either gained or lost electrons.
Either net negative or net positive.
Electrons that are donated
Polar covalent bonding can lead to the formation of?
Atoms joined by bonds.
If a substance dissociates such that the concentration of H+ exceeds that of -OH ions that substance is an?
Is a substance that either adds -OH ions to a solution Or removes H+ ions from solutions.
Water and life 4 important properties?
-high specific heat
-the solid state floats on the liquid state
-it’s a good solvent of polar molecules
How a tree gets water up to its branches
Molecules with affinity for water