based on the data above, a researcher hypothesizes that an increase in the frequency of ttx-producing new increase in the frequency of ttx-resistant snakes and promotes adaptations in snakes beyond the level of the newts. what evidence from each experiment best support this argument?

a.
| experiment 1 | experiment 2 |
| --- | --- |
| the negative association between ttx production and ttx resistance across the 28 west coast sites | the increase in the average ttx-resistance in snakes in the alaskan site over time |

b.
| experiment 1 | experiment 2 |
| --- | --- |
| the decreasing range of toxicity and possible error measured as ttx resistance increases | the level of ttx produced by and the mean resistance of garter snakes at the alaskan site in year 1 |

c.
| experiment 1 | experiment 2 |
| --- | --- |
| the level of ttx produced by newts in areas where snakes exhibit a resistance greater than 10 mg ttx | the increase in the percent of ttx-producing newts and ttx-resistant snakes at the alaskan site over time |

d.
| experiment 1 | experiment 2 |
| --- | --- |
| the level of ttx produced by newts in areas where snakes exhibit a resistance between 1 and 10 mg ttx | the increase in the percent of ttx-producing newts at the alaska site over time |

Question

based on the data above, a researcher hypothesizes that an increase in the frequency of ttx-producing new increase in the frequency of ttx-resistant snakes and promotes adaptations in snakes beyond the level of the newts. what evidence from each experiment best support this argument?

a.

experiment 1	experiment 2

b.

experiment 1	experiment 2

c.

experiment 1	experiment 2

d.

experiment 1	experiment 2

a.
| experiment 1 | experiment 2 |
| --- | --- |
| the negative association between ttx production and ttx resistance across the 28 west coast sites | the increase in the average ttx-resistance in snakes in the alaskan site over time |

b.
| experiment 1 | experiment 2 |
| --- | --- |
| the decreasing range of toxicity and possible error measured as ttx resistance increases | the level of ttx produced by and the mean resistance of garter snakes at the alaskan site in year 1 |

c.
| experiment 1 | experiment 2 |
| --- | --- |
| the level of ttx produced by newts in areas where snakes exhibit a resistance greater than 10 mg ttx | the increase in the percent of ttx-producing newts and ttx-resistant snakes at the alaskan site over time |

d.
| experiment 1 | experiment 2 |
| --- | --- |
| the level of ttx produced by newts in areas where snakes exhibit a resistance between 1 and 10 mg ttx | the increase in the percent of ttx-producing newts at the alaska site over time |

Accepted Answer

# Brief Explanations:
To support the hypothesis that increased TTX - producing newts lead to more TTX - resistant snakes and snake adaptations, we need evidence showing a link between TTX production in newts and TTX resistance in snakes, along with changes over time.
- Option A: Experiment 1's negative association doesn't support the positive relationship in the hypothesis, and Experiment 2's average resistance increase alone doesn't link to newt TTX production.
- Option B: Experiment 1's decreasing toxicity range and Experiment 2's year - 1 data don't show the required temporal and associative evidence.
- Option C: Experiment 1 shows newt TTX production in areas with high snake resistance (suggesting a link), and Experiment 2 shows an increase in both TTX - producing newts and TTX - resistant snakes over time, which directly supports the hypothesis.
- Option D: Experiment 1 focuses on a narrow resistance range, and Experiment 2 only mentions newt TTX production increase, not the snake resistance increase in tandem as needed.

# Answer:
C.
Experiment 1: the level of TTX produced by newts in areas where snakes exhibit a resistance greater than 10 mg TTX
Experiment 2: the increase in the percent of TTX - producing newts and TTX - resistant snakes at the Alaskan site over time

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