All or nothing principle
2 marks - Action potential occurs only when threshold is reached,
High pressure acts as stimulus.
Describe and explain 1997 results
2 marks - 1997 had the greatest species count,
But only a few species dominated in large numbers.
Describe how Pacinian corpuscle produces generator potential
3 marks - Stretch-sensitive sodium ion channels,
Channels open,
Sodium ions enter.
Diversity of fish formula years value
1 mark - 1982 and 2003.
Hardy-Weinberg explanation
2 marks - No, individuals with autoimmune disease less likely to reproduce,
Allele not passed on.
How SCFR destroyed by lysosome
2 marks - Vesicle fuses with lysosome,
Lysosomal enzymes break down SCFR.
Link reaction A B C D
2 marks - A = Pyruvate,
B = NADH,
2 marks - Action potential occurs only when threshold is reached,
High pressure acts as stimulus.
Describe and explain 1997 results
2 marks - 1997 had the greatest species count,
But only a few species dominated in large numbers.
Describe how Pacinian corpuscle produces generator potential
3 marks - Stretch-sensitive sodium ion channels,
Channels open,
Sodium ions enter.
Diversity of fish formula years value
1 mark - 1982 and 2003.
Hardy-Weinberg explanation
2 marks - No, individuals with autoimmune disease less likely to reproduce,
Allele not passed on.
How SCFR destroyed by lysosome
2 marks - Vesicle fuses with lysosome,
Lysosomal enzymes break down SCFR.
Link reaction A B C D
2 marks - A = Pyruvate,
B = NADH,
