Question 5 (multiple choice worth 2 points)

artificial selection occurs when

scientists make an exact copy of an organism
scientists remove genes from a cell to study them
scientists turn genes on and off in order to change a characteristic
scientists make two animals mate in order to produce offspring with desired traits

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip. nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule. true/false

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

What are the result of when individual components in an organism interact with others to create noval stucture and function called