Test 1 Flashcards
What is nutrition?
Activities by which an organism takes materials from its environment and uses it for growth and repair
What is respiration?
A further breakdown of nutrients that gives off chemical energy
An organism needs energy to:
Grow, develop, or repair.
What is transport?
The process by which usable materials are taken by the organism and distributed throughout the organism.
What is biology? (Include roots)
Bio-life
Ology- study of
Biology-study of life
Why is the circulatory system necessary?
Required by larger organisms to transport materials.
What is excretion? (give example)
Removing harmful substances from the body (examples: breathing out CO2, releasing urine)
What is synthesis?
The process by which smaller, simpler substances are combined chemically to form huger, more complex substances. Chemical bonds, such as shared electrons, hold them together. Example: our cells build proteins for our use, such as melanin (pigment found in our skin)
What is regulation?
Organisms detect and respond to stimuli (stimulation) from their environment (ex: sweating)
What is the difference between growth and development?
Growth-increase in number and size in cells
Develop-Cells begin to look different from one another and perform different functions
What is a unicellular organism?
An organism with only one cell
What is reproduction? (All, asexual and sexual)
Organisms create new, similar organisms.
In asexual reproduction, the new organism has ONE parent.
In sexual reproduction, two cells from different parents unite to form an organism.
What is a multicellular organism?
An organism with more than one cell.
What is a stimulus?
Signals to which an organism responds, such as light, sound, and touch.
What is metabolism?
ALL (not just digestion) the chemical reactions by which an organism breaks down or builds material needed for its life.
What is homeostasis?
A stable internal balance that all organisms maintain.
The Scientific Method
Series of steps used to solve problem
- Recognizing the problem
- Researching the problem
- Forming a hypothesis
- Set up a controlled experiment
- Drawing conclusions
What is a hypothesis?
A prediction that is testable
Example of hypothesis
If saltwater is used to water the plant, the plants growth will be negatively affected.
Testing a hypothesis
Using a series of steps with controlled conditions called an experiment
What is the independent variable?
The only factor that can change when you set up an experiment
What is the dependent variable?
A change that occurs during the experiment bc of the independent variable
What is the control group?
Group without change, serves as basis of comparison
What is a theory?
Well tested explanation that unifies a large range of observations and hypotheses allowing scientists to make predictions about new situations
