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

1. Introduction to Biology

Natural Selection and Evolution

General Biology

1. Introduction to Biology

Natural Selection and Evolution

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Multiple Choice

Which statement best hypothesizes the evolutionary history of the area shown?

Environmental changes caused all original species to go extinct without any adaptation or speciation.

Species in the area adapted to changing environmental conditions through natural selection, leading to the emergence of new traits over time.

All species in the area remained unchanged despite environmental shifts, indicating no evolutionary processes occurred.

The area was colonized by a single species that did not diversify or adapt to local conditions.

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Verified step by step guidance

Understand the concept of evolution and natural selection: Evolution refers to the change in the genetic composition of a population over generations. Natural selection is a mechanism of evolution where individuals with advantageous traits are more likely to survive and reproduce, passing those traits to the next generation.

Analyze the options provided: Each statement represents a different hypothesis about how species in the area responded to environmental changes. Consider which hypothesis aligns with the principles of evolution and natural selection.

Evaluate the first option: 'Environmental changes caused all original species to go extinct without any adaptation or speciation.' This suggests no survival or adaptation occurred, which contradicts the idea of natural selection enabling species to adapt to changing environments.

Evaluate the second option: 'Species in the area adapted to changing environmental conditions through natural selection, leading to the emergence of new traits over time.' This aligns with the principles of evolution, as natural selection can lead to the development of new traits and speciation in response to environmental changes.

Compare the remaining options: The third option suggests no evolutionary processes occurred, which is unlikely given environmental shifts. The fourth option suggests no diversification or adaptation, which also contradicts evolutionary principles. Conclude that the second option best aligns with the evolutionary history of the area.