Bird-pollinated flowers (ornithophilous) have nectar that is appropriate for the diet of hummingbirds. the color of these flowers is well-suited for the hummingbirds’ vision. finally, the flowers’ blooming season and hummingbirds’ mating season overlap. this is an example of what?

a) predator/prey symbiotic relationship

b) punctuated equilibrium

c) coevolution

d) divergent evolution

Ameadow ecosystem includes many species of grasses and small shrubs, several herbivores, and a few carnivores. a fungus colonizes the meadow and kills most of its vegetation. what is most likely to happen to the populations of herbivores and carnivores in the ecosystem? a. the populations of herbivores and carnivores will increase because there will be less competition for chemical energy. b. the populations of herbivores and carnivores will remain stable because the fungus cannot infect these organisms. c. the populations of herbivores will decrease because of vegetation loss, but the population of carnivores will remain stable. d. the populations of herbivores and carnivores will decline because less chemical energy will be stored in the ecosystem.

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?

50 points! which of the following is an inference? a burning candle is extinguished when it is covered with a jar. the candle burns longer than expected in a jar that has a plant in it. a plant lives longer than expected in a jar that has a burning candle. there is more oxygen in the jar because there is a plant in it.