Which of the following is typical of the selection of survey participants? O They can indicate partiality toward a group.
O They must be representative of the population.
O They must be surveyed more than once.
O They can be selected on purpose by a researcher.

Y=‐1x + 7 if y has a value of ‐24 what is the value of x?

If two atoms are bonded to a central atom with no lone pairs, how will they be arranged

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange