How do biological communities get to be the way they are?
a. ecological succession
b. ecological regression
c. ecological decline
d. ecological mining

Why do you think the puppy litter was all dark-haired?

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

Which of the follow describes a disadvantage secondary sources have compared to primary sources?