P, q and r are three consecutive terms of an a. p.express in terms of q and d ,where d is the common difference. if the sum of the terms is 21 and p=6r, find p, q and r

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?