In medical studies where a new drug is tested, The control group would be asked to take a pill (or treatment) that looks/tastes just like the real thing, but would not be told whether they have the
actual drug or not. The experimental group would receive the real drug. What type of study is it where the test subjects do not know their assigned group.

Random Study
Blind Study
Biased Study
Controlled Study

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explanation:

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the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".