1. Suggest a control treatment for each of the following experiments a. To inves
ID: 191305 • Letter: 1
Question
1. Suggest a control treatment for each of the following experiments
a. To investigate if spots on butterfly wings scare off songbirds, scientists expose birds to butterflies with large spots.
b.To investigate if night lights foster depressions, a group of hamsters is kept in chronic dim light throughout the night.
2. Propose an experiment and suggest a control treatment for each of the following.
a. Is the cause of colic in newborns related to the microbial community in thier intestines?
b. female waterbugs lay their eggs on the backs of male waterbugswho care for the eggs. Do female waterbugs prefer to mate with male waterbugs with large number of eggs?
Explanation / Answer
1. Suggest a control treatment for each of the following experiments
b. To investigate if night lights foster depressions, a group of hamsters is kept in chronic dim light throughout the night: The control treatment for this experiment would be to maintain a group of hamsters in a normal light / dark cycle, according to their physiological specifications. In this way, you could compare the change between the experimental group (group in the dark) and the group under normal conditions.
2. Propose an experiment and suggest a control treatment for each of the following.
a. Is the cause of colic in newborns related to the microbial community in their intestines?
· You would have to plan a case/control experiment. Cases will be newborns with colics, and control will be newborns without colics.
· Experiment: Take stool samples and get the microbial DNA in it, then sequence the 16S gene to evaluate the composition of the microbial community present in newborns with and without colics. With these two groups, you will be able to evaluate the differences between the microbial community present in their intestines and determine if these microbes are involved in the presence of colics or not, in newborns.
· The experimental group (case group) would consist of newborns with colics.
· The control group will consist of newborns (same age than experimental group) without colics.
b. Female waterbugs lay their eggs on the backs of male waterbugs who care for the eggs. Do female waterbugs prefer to mate with male waterbugs with large number of eggs?
· The experiment will consist in placing female waterbugs with males who don’t have eggs on their backs, and, female waterbugs with males with a large number of eggs on their back. After defining the groups, female waterbug’s behavior will be assessed and defined if they prefer to mate with males with or without eggs on their back.
· The control group will consist of the females with males with eggs on their backs because that represents they take care of the eggs.
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