Ch. 1 The Study of Life
What is a hypothesis?
A testable explanation.
Another word for producer.
autotroph
What factors define biomes?
Temperature, precipitation, soil type, types of plants and animals that live there, amount of light and water (aquatic)
The study of ________________ helps to predict changes in human population
What is demographics (demography)
These make up the nucleus of an atom.
protons and neutrons
What are the sequence of steps of the scientific method?
Observe, question, make a testable explanation, experiment, collect and analyze data, state findings.
The six levels of organization (biological hierarchy) in order from smallest to largest are...
organism, population, community, ecosystem, biome, biosphere
The establishment of a community in an area of exposed rock that does not have any topsoil is _________ __________. It usually occurs very slowly at first.
primary succession
What is zero population growth rate?
when birth rate equals death rate and immigration rate equals emmigration rate
All biological molecules contain this element.
carbon
Experiment: Determine the effect of adding soda to a plant. Scientists will have two plants. One that is watered with water and the other with soda. They will take daily measurements of the height of the plan to measure growth. What is the independent variable?
the soda being added to the plant
A group of different species that lives together in one area, such as groups of alligators, turtles, birds, fish and plants that live together in the Florida Everglades.
Biological Community
_____________ ___________ is the orderly and predictable change that takes place after a community of organism has been removed but the soil has remained intact.
secondary succession
Give an example of a density independent factor.
any natural disaster or weather event.
Monomer is called a nucleotide. Nucleotides are made of phosphate group, sugar and a base. DNA and RNA are examples.
nucleic acids
Experiment: Determine the effect of adding soda to a plant. Scientists will have two plants. One that is watered with water and the other with soda. They will take daily measurements of the height of the plan to measure growth. What is the dependent variable?
growth of the plant
a relationship between organisms that strive for the same resources in the same place
competition
Any abiotic factors or biotic factor that restricts the numbers, reproduction, or distribution of organisms is called a ____________ __________.
limiting factors
Give an example of density dependent factor
parasites, predation, competition etc
When added to water, how does an acid affect the pH and H+ concentration?
The pH decreases while the H+ increases.
Experiment: Determine the effect of adding soda to a plant. Scientists will have two plants. One that is watered with water and the other with soda. They will take daily measurements of the height of the plan to measure growth. What is the control in the experiment?
the plant being given water
If an organism is an herbivore, what is it's trophic level on an energy pyramid
primary consumer
The ability of any organism to survive when subjected to abiotic factors or biotic factors is called __________.
Tolerance
the pattern of spacing of a population within an area
dispersion
NaCl, C6H12O6, and H2O are all examples of these.
compounds