Table of contents

1. Introduction to Biology2h 42m
2. Chemistry3h 37m
3. Water1h 26m
4. Biomolecules2h 23m
5. Cell Components2h 26m
6. The Membrane2h 31m
7. Energy and Metabolism2h 0m
8. Respiration2h 40m
9. Photosynthesis2h 49m
10. Cell Signaling59m
11. Cell Division2h 47m
12. Meiosis2h 0m
13. Mendelian Genetics4h 44m
14. DNA Synthesis2h 27m
15. Gene Expression3h 6m
16. Regulation of Expression3h 31m
17. Viruses37m
- Viruses
  37m
18. Biotechnology2h 58m
19. Genomics17m
- Genomes
  17m
20. Development1h 5m
21. Evolution3h 1m
22. Evolution of Populations3h 53m
23. Speciation1h 37m
24. History of Life on Earth2h 6m
25. Phylogeny2h 31m
26. Prokaryotes4h 59m
27. Protists1h 12m
28. Plants1h 22m
29. Fungi36m
- Fungi
  19m
- Fungi Reproduction
  17m
30. Overview of Animals34m
- Overview of Animals
  34m
31. Invertebrates1h 2m
32. Vertebrates50m
33. Plant Anatomy1h 3m
34. Vascular Plant Transport1h 2m
- Water Potential
  1h 2m
35. Soil37m
- Soil and Nutrients
  20m
- Nitrogen Fixation
  16m
36. Plant Reproduction47m
- Flowers
  33m
- Seeds
  14m
37. Plant Sensation and Response1h 9m
38. Animal Form and Function1h 19m
39. Digestive System1h 10m
- Digestion
  1h 3m
- Blood Sugar Homeostasis
  7m
40. Circulatory System1h 49m
41. Immune System1h 12m
42. Osmoregulation and Excretion50m
- Osmoregulation and Excretion
  50m
43. Endocrine System1h 4m
- Endocrine System
  1h 4m
44. Animal Reproduction1h 2m
- Animal Reproduction
  1h 2m
45. Nervous System1h 55m
- Neurons and Action Potentials
  1h 8m
- Central and Peripheral Nervous System
  46m
46. Sensory Systems46m
- Sensory System
  46m
47. Muscle Systems23m
- Musculoskeletal System
  23m
48. Ecology3h 11m
49. Animal Behavior28m
- Animal Behavior
  28m
50. Population Ecology3h 41m
51. Community Ecology2h 46m
52. Ecosystems2h 36m
53. Conservation Biology24m
- Conservation Biology
  24m

53. Conservation Biology

Conservation Biology

General Biology

53. Conservation Biology

Conservation Biology

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0:50 minutes

Problem 8

Textbook Question

Which of the following human activities generates the most carbon dioxide?
a. Driving
b. Cooking
c. Bathing
d. Using aerosol sprays

Verified step by step guidance

Identify the primary source of carbon dioxide (CO₂) emissions in each activity. For example, driving involves burning fossil fuels, which releases CO₂, while cooking, bathing, and using aerosol sprays may involve less direct or indirect CO₂ emissions.

Understand that driving typically involves the combustion of gasoline or diesel in internal combustion engines, which produces significant amounts of CO₂ as a byproduct of burning hydrocarbons.

Analyze the other activities: cooking may involve burning natural gas or using electricity (which could indirectly produce CO₂ depending on the energy source), bathing primarily involves heating water (again, potentially using electricity or gas), and aerosol sprays no longer use chlorofluorocarbons (CFCs) but do not directly emit CO₂.

Compare the scale and frequency of CO₂ emissions from each activity. Driving generally occurs over longer durations and involves higher energy consumption compared to the other activities, making it a larger contributor to CO₂ emissions.

Conclude that driving is the activity that generates the most carbon dioxide among the options provided, due to the direct combustion of fossil fuels in vehicles.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Carbon Dioxide Emissions

Carbon dioxide (CO2) is a greenhouse gas primarily produced by human activities, especially through the burning of fossil fuels. Understanding the sources of CO2 emissions is crucial for evaluating their impact on climate change. Different activities release varying amounts of CO2, with transportation and energy production being significant contributors.

Fossil Fuels and Combustion

Fossil fuels, such as gasoline and natural gas, are major energy sources that release CO2 when burned. Activities like driving a car involve combustion of these fuels, leading to substantial CO2 emissions. In contrast, cooking and bathing typically produce less CO2, depending on the energy source used.

Comparative Analysis of Activities

To determine which human activity generates the most CO2, a comparative analysis of the emissions from each option is necessary. This involves assessing the frequency and intensity of each activity, as well as the type of energy used. For instance, driving generally results in higher emissions compared to cooking or bathing, making it a key factor in this analysis.

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Related Practice

Textbook Question

Movement corridors are

a. The routes taken by migratory animals.

b. Strips or clumps of habitat that connect isolated fragments of habitat.

c. Landscapes that include several different ecosystems.

d. Edges, or boundaries, between ecosystems.

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Textbook Question

Biologists claim that the all-taxa survey now under way at the Great Smoky Mountains National Park in the United States will improve their ability to estimate the total number of species living today. Discuss the benefits and limitations that this data set will provide in understanding the extent of global biodiversity.

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Textbook Question

With limited resources, conservation biologists need to prioritize their efforts. Of the following choices, which should receive the greatest attention for the goal of conserving biodiversity?

a. A commercially important species

b. All endangered vertebrate species

c. A declining keystone species in a community

d. All endangered species

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Textbook Question

Some biologists prefer to focus efforts on preserving endangered species while others prefer to focus on preserving ecosystems. What is your advice to biologists, based on the evidence?

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Textbook Question

Which of the following statements about protected areas is not correct?a. We now protect 25% of the land areas of the planet.b. National parks are only one type of protected area.c. Most reserves are smaller in size than the ranges of some of the species they are meant to protect.d. Management of protected areas must coordinate with the management of lands outside the protected zone.

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Textbook Question

Explain why the construction of wildlife corridors can help maintain genetic diversity in a fragmented landscape.

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Textbook Question

What are the three levels of biological diversity? Explain how human activities threaten each of these levels.