AP Biology 12
Lab 1: Diffusion and Osmosis
Sept. 30 2011
Exercise 1A: Diffusion
Diffusion is the movement of particles from high concentration to low concentration. In
the lab conducted, diffusion was seen through evidenc
The two main focuses for this lab is to observe the external structured of a crayfish and dissect it
to study its internal structures and systems.
The main difference between the cephalothorax a
1. The skin of the frog is smooth and moist.
2. The dorsal surface of the frog is a darker green and spotted, compared to the ventral surface
which is a lighter green and is not spotted.
3. There are 4 digits on each of the frogs hands.
Respiration is all about the exchange of oxygen and carbon dioxide through the air, blood
and body tissue.
Breathing happens in two phases; Inhaling and Exhaling
When you inhale the chest cavity expands to let air containing O2 into the lungs
AP Bio: Diffusion & Osmosis Labs
Lab. 1A Diffusion:
Diffusion is the erratic movement of molecules from an area of higher solute concentration to an
area of lower solute concentration. As the higher concentration of the solute diffuses into
Biology Final Exam Review
People who helped Darwin to develop his idea of natural selection:
Wallace influenced Darwins theory of evolution because he had the same theory as Darwin.
Darwin would not have completed his book if it werent for this
Cabbage Juice Indicator Lab
Purpose: To test the PH of various items using cabbage juice as an indicator.
AP Biology 12
Turner syndrome (TS)
This genetic disorder is present in human females. Statistics show that 1 in 2500 girls
are affected by this. It is a chromosomal mutation in which one of the X chromosomes in
a female is missing.
AP bio 12
Stem cell based therapies
Stem cells-general information:
-individual cells at early development are undifferentiated, they dont have a specific
function and can contribute to any and all organs in the body (totipotent)
- These cells are known a