Definitions
What is natural selection?
nature selects those individuals who are best fit for the environment.
Independent Variable
is the one thing that "I" change to test my hypothesis. Ex: The effect of sunlight (IV) on plant growth (DV).
What did you measure in the clothespin lab and learn?
how exercise affected pulse rate. Exercise also increases pulse rate.
ecology
is the study of how organisms interact with living and non living things.
Control Group
Is the group that is studied under normal conditions.
What did you do in the clothespin lab?
squeeze a clothespin for 1 minute and then squeeze it again for another minute.
Limiting factors
are the living and nonliving things in the environment that limit the size of populations. Ex: food, shelter, sun, space, oxygen.
Where does the IV go on a graph and DV?
X axis (which is the bottom) for IV and DV goes on the Y axis.
Relationships and Biodiversity *Botana Curus Lab* what did you do?
Compared 4 species of plants based on structural (physical) and molecular (Chemical and genetic) traits.
carrying capacity
Is the maximum population (number of organism of any species) that an ecosystem can support.
How can you make an experiment more valid?
repeat the experiment, increase the number of specimens or trials, peer review.
What did you learn in the botana curus lab?
species that are related share similar traits.
gel electrophoresis and paper chromotography can be used to determine relationships between organisms.
What do the arrows in a food chain show?
direction of energy flow.
How do you calculate total magnification?
for a 10x eye piece and 10x and 40x objectives:
total magnifcation on low power: 10x10 =100x
total magnification on high power= 10x40 = 400x
Why should endangered species be protected?
They may offer benefits to humans.