17. Endemic species are those that are typically found in a given region. 18. Hu
ID: 100482 • Letter: 1
Question
17. Endemic species are those that are typically found in a given region.
18. Humans are a tertiary consumers because they eat animal tissues.
19. In many ecosystems, the abundance of a species may be determined by a species that feeds on it. This is an example of top-down control.
20. It takes about 10x more energy to grow a cow than to grow wheat.
21. Many insects are food for birds. Since both of these are animals, changes in climate will have minimal effect because it would affect both organisms in a similar manner.
22. Much of the energy that is available in a diet is lost to inefficiencies in the form of heat.
23. Net primary productivity (NPP) is the total amount of chemical energy captured by primary producers.
24. Resilience of a community is a measure of how stable it remains in terms of biodiversity.
25. Since evolution acts at the level of gene frequencies, biodiversity is best assessed at the level of gene frequencies.
26. The most important species to conserve are those that represent unique lineages.
27. The recent increases in anthropogenic activities, including those that result in climate change, are likely to lead to the first mass extinction event in the history of the planet.
28. Wildlife corridors are strips of habitat connecting two reserves which permits animals to move between at diminished risk.
Explanation / Answer
17) True.
Endemic species are plant and animal species that exist in only one geographic region.
18- False
Humans are tertiary consumers because they are capable of eating primary consumer and as well as secondary consumers.
19) False.
Top down control is that the highest trophic level exert a controlling effect on species at the next lower level (their prey) and so forth down the trophic ladder.
20) True.
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