As a river transitions to less steep land, it gets wider and slower and... - receives more rain and pollution, and fewer photosynthetic organisms
- contains less dissolved oxygen and more photosynthetic organisms
- gets cooler, more sunlight, and more photosynthetic organisms
- contains more oxygen, more nutrients, and fewer algae blooms

humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms