Suppose that in another world, dna does not undergo semiconservative replication, but instead a conservative mechanism is used. in a repeat of the meselson and stahl's experiment, bacterial cells that are grown in 15n medium for many generations then transferred to 14n medium for two generations will have the following distribution of dna molecules in a cscl gradient

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

What’s the student’s scientific question