Which of the following is an assumption made by the logistic model?
a. every individual has the same negative effect on population growth rate, independent of density.
b. populations that reach carrying capacity always experience a delay before the negative effects occur.
c. there are no other species competing for the same resources as the observed population.
d. there is no immigration or emigration of individuals occurring within the population.

What is the name for a substance formed in a chemical reaction

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. label the following topographic map. click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (increments for contour lines is 50 ft).

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?