AB Bio Lab Questions - Lab # 11 and Lab # 10

Test Preparation AP Test Preparation
1

<p>I need help with the following animal behavior lab questions. Please offer the following solutions:</p>

<p>1) Control
2) Dependent and independent variables
3) How to setup the experiment since most of them are lot bigger than fruit flies (used in AP Animal Lab)</p>

<p>Free Response Qn 1:</p>

<p>This question was on AP Audit. The mass of kangaroo rats versus annual precipitation rates. The experimental data shows that mass of kangaroo rats was lower at lower and higher precipitation. But the mass of the rats showed a jump in the median precipitation. They are asking to design an experiment to validate the adaptation mechanism of the rats. We can possibly choose any hypothesis. One of them would be to say, in case of lower and higher precipitation the kangaroo rats have less food/predators and during optimal periods of rain they still have more food/more predators. </p>

<p>Good news is, we can come up with our own hypothesis out of several possibilities, like food availability, predator-prey, disease etc.,</p>

<p>Free Response Qn 2:</p>

<p>A similar question would be related to stimuli response of CO2 emission which attracts mosquitoes to bite humans/animals. The ideal setup would be to use a two glove box type setup. But CO2 is a gas it diffuses to both chambers. What is the control? How do we setup this experiment? </p>

<p>Free Response Qn 3:</p>

<p>One more question was on male garter snakes sensing female snakes’ pheromones for mating relationship. What is the control? How can we conduct the experiment realistically? </p>

<p>This Question is from Lab 10.</p>

<p>Compare the metabolic/heart rate of 20g lizard (ectotherm) and 20g rat (endotherm). When you design this experiment, we are not going to torture them to get their heart beat right? So, we may use some metabolic rate measurements like in the cellular respiration experiment. Measure O2 used or CO2 emitted. Am I right here? In addition, can any one predict the results of metabolic rates for? </p>

<p>Let’s discuss and do the best in the exam. Thanks</p>

<p>JAY</p>