Approximately 14,000 years ago, the climate in North America began to warm rapidly. At the same time, human hunters migrated to the continent. Which of these most likely resulted from a combination of these two factors? an increase in the rate of large mammal extinctions a reduction in the rate of species change an increase in the amount of interspecies cooperation a reduction in the total number of small parasitic insects

WRITE ABOUT A THEME: INTERACTIONS One factorfavoring rapid population growth by an introduced speciesis the absence of the predators, parasites, and pathogens thatcontrolled its population in the region where it evolved. In ashort essay (100–150 words), explain how evolution by naturalselection in a region of introduction would influence the rateat which native predators, parasites, and pathogens attack anintroduced species.

A rain forest habitat is located in an equatorial area with a warm, wet climate. Nearby is a savanna, where the climate is equally warm but much drier. Species diversity is much higher in the rain forest. Which rain forest habitat characteristic most likely explains this difference? O More disturbances, leading to rapid species turnover O More complex habitat structure, enabling greater food availability O More complex habitat structure, enabling greater niche specialization O Fewer disturbances, leading to rapid population growth of a few species O Fewer open spaces, leading to inability of organisms to leave the habitat

The Gulf of St. Lawrence is home to the beluga whalesThere once were thousands of belugas in this popula tion, but now there are fewer than 1000 whales. High levels of organic chemicals have been found in the bod ies of dead whales. Describe how bioaccumulation and biomagnification have contributed to harmingthe be luga whales.

CA least tern ENDANGERED ANIMAL is  CA least tern questionbases on the bird CA least term  Reasons for Endangerment Explain the various factors that have led to this species’ current plight. Expand on these points individually, based on your species’ unique story.  Domino Effects As we’ve learned, species are not islands unto themselves; they are integrated with many other organisms in trophic relationships, mutualisms, competition, etc. How is the absence of this species (or its lowered population size) likely to impact the other members of its habitat? (If findings specific to this point are available, please include them – otherwise, I’m asking you to speculate based on what you’ve learned about the biology of this organism.)  Conservation Efforts Discuss past, current, and proposed efforts to conserve this species. Are these strategies effective? Are they realistic? What is the outlook for this organism?

looks at the change in the heritable characteristics of populations over successive generations. O Habitat formation Secondary Succession The theory of evolution O A common ancestor

Why might the increasing human population result inan increase in the extinction rate of other species?

What makes the Galapagos Islands unique, causing it to have many endemic species?          The location of the islands is in an area where only certain species can reach it.          Cold water from the South Pole and warm water from the equator bring species from both climates.         The islands have a constant hot ocean current from the equator and only certain species can survive in the heat from the hot current.         The islands have an extremely dry climate, and only certain species are able to survive in the desert-like conditions.

Answer this correctly and QUICKLY PLS

Which of the below would best be described as a metapopulation?     Killer whales are predicted to cause major shifts in the future abundance of prey species such as seals   The Hawaiian stilt, an endangered, endemic bird of the Hawaiian Islands, was reduced to 200 individuals by hunting and development   California mountain sheep disperse between mountain ranges and occupy previously unpopulated sites. Human-made barriers, such as highways, almost completely eliminate movement among populations   Leadbeater's possum, an endangered arboreal marsupial inhabiting a rare type of eucalyptus forest in southeastern Australia, is predicted to decline by more than 90% over the next 20 to 30 years