Sexual Selection Lab

Only available on StudyMode
  • Download(s) : 369
  • Published : November 30, 2012
Open Document
Text Preview
***START OF PAGE 1***
1) Hypothesis [2 marks]
|An isopod’s body length and speed affect its chances of predator avoidance. |

2) Plausible reason why/how each independent variables affect the dependent variable. [2 marks] |An isopod’s body length, specifically if it is short, will allow it to move faster. If an isopod has low speed it will not likely avoid predators as | |much as an isopod which moves fast. |

3) Prediction(s): [2 marks]
|If an isopod’s body length and speed have an effect on its chances of predator avoidance, then some traits will be better adapted to the environment | |and as a result, would increase the isopod frequency and those traits will be passed on to subsequent generations. |

4) Null Hypothesis: [1 mark]
|Body length and an isopod’s speed have no affect on its chances of predator avoidance. |

5) Prediction of Null Hypothesis: [1 mark]
|If an isopod’s body length and speed have no affect on its chances of predator avoidance, then there will be no change to frequency since those traits | |will not be passed on to subsequent generations because they provide no advantage in regards to fitness and predator avoidance. |

6) Results and Conclusions:
a) Figures 1 (for size) & 2( for speed): Inserted on page 2. [7 marks, 3.5 marks per figure]

b) Isopod length and success against predation: [3 marks]
|The mean average for isopod length in the initial population is 12.8mm. The mean average for isopod length in the survivor population is 13.8mm. The | |selection intensity is 1 mm. There is a slight shift towards longer isopods. Looking at the figure 1, the isopods with a body length between 12.1 mm- |...
tracking img