Farmer brown believes that increasingly large doses of antibiotics will produce increasingly large beef cattle. what is the correct match between experimental variables and activities in farmer brown's experiment?
a) dependent variable; all cattle receive the same hay, water, and living quarters.
b) control variable; different groups of cattle are given different doses of antibiotics.
c) independent variable; farmer brown tests only antibiotic x in even incremental dosages.
d) hypothesis; farmer brown observes that dosage with 500 mg of antibiotics produces the most weight gain.

The answer is B, control variable; Different groups of cattle are given different doses of antibiotics.

Explanation:

Control variable is a variable that is held constant in order to assess or clarify the relationship between other variables in an experimental design. Essentially, a control variable is what is kept the same throughout the experiment, and it is not of primary concern in the experimental outcome. Any change in a control variable in an experiment would invalidate the correlation of dependent variables (DV) to the independent variable (IV), thus skewing the results.

The concern of the experiment is the relationship between antibiotics and growth rate, hence the animals will be grouped in at least 3 treatment groups and each would be given different level of antibiotics, and a control group which won't be given any antibiotics. Though every other variable like feed, drink, temperature etc will be same for all groups including the control group in order to prevent bias.

At the end of the experiment, the control group which wasn't given any antibiotic will be compared with those groups which were given, hence the group which performs best would be determined.

type 2 happens when excess consumption of high-sugar foods flood the blood supply with glucose and reduce the production and effectiveness of insulin. if a person has prediabetes, they can reduce the risk of full diabetes through regular exercise and a balanced, low-sugar diet.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.