m Th uructure and maintenance of all ecosystems results from the types of plants

Question

m Th uructure and maintenance of all ecosystems results from the types of plants in that ecosystem B) bacteria fungi and sols in that ecosystem types of animals in that ecosystem D) the totality of organisms in that ecosystem 18) Invasive species have been AN hunted to extinction in most places where they occur 18) B) successfully controlled by the introduction of other alien species that arenatural competitors CO controlled in most regions using predators, viral or bacterial agents D) an ecological problem in North America since the first European colonists arrived 19 This plant is the rosy periwinkle, which produces chemicals that are important in the treatment of 19) several types of cancer. This medically significant plant represents the potential of A) the fields of ethnobotany and bioprospecting B) the fields of bioinformatics and agriculture D) bioengineering. 20) The fragmentation of natural habitats in the conversion of land for humanuses creates 20) A focused regions where careful wildlife management can actually increase biodiversity D more opportunities to preserve wildlife in many small parks 21) ultralight aircran played an important part in the recovery of whooping cranes by 21) A) distributing vital supplies of food populations during severe winter storms B spotting potential predators from the sky leading flocks of these birdson their seasonal migrations D) identifying unknown populations of these birds from the sky

Explanation / Answer

17 The structure and maintenance of all ecosystems results from the

- D (THE TOTALITY OF ORGANISMS IN THAT ECOSYSTEM).

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