Apes Chapter 3 Questions Essay

1233 Words Nov 11th, 2012 5 Pages
Chapter 3 Reading Questions:

1. Core Case Study: “Have you thanked your insects today?”- Explain why insects are significant.
Many of the earth’s plant species depend upon insects to pollinate them. Carnivorous insects, such as the praying mantis, control the ‘pest’ insect population.
2. What percentage of the species on this planet consists of insects? Animals? Plants?
53% are insects; 20% are other animals; 18% are plants.
3. Give three examples of how we benefit from microbes.
Soil bacteria convert nitrogen gas into usable forms for plants; they decompose wastes into nutrients we use; they help produce various foods such as bread, cheese, wine, beer, and tofu.
4. What percentage of the biomass on this planet accounts for
…show more content…
Abiotic consists of non-living components such as water, air, nutrients, and solar energy. Biotic consists of biological components such as producers, consumers, and decomposers. Each population in an ecosystem has a range of tolerance to variations in its physical and chemical environment.
10. Explain how limiting factors can control population size.
Too much or too little of any abiotic factor can limit or prevent growth of a population, even if all other factors are at or near the optimum range of tolerance.
11. What factors usually limit terrestrial populations?
On land, precipitation and soil nutrients are often limiting factors.
12. What factors usually limit aquatic populations?
In water, temperature, sunlight, nutrient availability, dissolved oxygen content, and salinity are limiting factors.
13. What is the overall chemical reaction for photosynthesis?
6CO2 + 6H2O (+ light energy) C6H12O6 + 6O2.
14. What is the overall chemical reaction for respiration?
C6H12O6 + 6O2 ---> 6CO2 + 6H2O + 36 ATP
15. Why are decomposers so significant to an ecosystem?
They recycle the nutrients that make life possible throughout the ecosystem.
16. Why is biodiversity one of our most important renewable resources?
Biodiversity provides us with natural resources, natural services, pleasure, and keeps the balance of the food web.
17. Describe 4 key components of biodiversity.
Functional diversity includes the biological and chemical processes such

Related Documents