4. Think about a food web in a marine, fresh-
water, or terrestrial ecosystem. Describe a
producer-consumer relationship, a predator-
prey relationship, and a parasite-host

Which of the following statements is true? a. the main cause for speciation is an increase in gene flow. b. organisms that reproduce asexually are not considered part of a species. c. on a tree of life diagram, speciation is shown by the merging of two different lineages. d.the size of the geographic area inhabited by a population can cause speciation.

What types of energy transfers and energy transportations are involved in the domino chain reaction?

How water is moving through the ecosystem ?