Dr. Foster was studying the effects of zinc on the common cold. She hypothesized that zinc would shorten the duration of the common cold. She conducted a study in which patients suffering from a cold were given daily doses of either zinc or a placebo and the amount of time it took for them to feel better was measured. whats the independent variable: whats the dependent variable: whats the constant variable: whats the control group: whats the experimental group:

Independent variable: Zinc doses Dependent variable: The duration of the cold. Control group: patients who received the placebo. Experimental group: Patients who received the dose of zinc.

Explanation:

The independent variable is one that does not need to be influenced by anything to be measured. In addition, this variable influences the result of the experiment. In the above experiment, we can see that Dr. Foster is analyzing the influence of zinc doses on the duration of colds, with that we can conclude that the zinc doses (which influence a result) are the independent variables.

The dependent variable is one that needs an influence to be measured. This influence is the independent variable, which influences a result within the dependent variable. As we can see in the above experiment, the duration of the cold is influenced by the zinc dozen, therefore, the duration of the cold is the dependent variable.

The experimental group is the group that receives the element that is being tested in the experiment. The experiment is testing zinc doses, so the group of patients who received the zinc doses is the experimental group.

The control group is the group that did not receive the element that is being tested in the experiment. The group that did not receive the zinc doses is the control group.

Ihate school can u relate

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.