Why is an overabundance of nutrients harmful to a water supply? a. it decreases the number and types of aquatic plants. b. it sterilizes water. c. it kills all aquatic plants. d. it causes excessive aquatic plant growth.

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.