Phytoplankton production in the North Atlantic peaks in the spring and mostly comes to a halt in the winter. In the North Pacific, plankton production occurs throughout the winter months. This difference in productivity between the North Atlantic and Pacfic is due to: Group of answer choices

sunlight availability

salinity of the mixed layer

different species of plankton

thermocline

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

i think the answer would be d

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms