Table of contents

1. Introduction to Biology2h 42m
2. Chemistry3h 40m
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 12m
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

Introduction to Taxonomy

General Biology

1. Introduction to Biology

Introduction to Taxonomy

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Multiple Choice

In a cladogram showing the evolutionary relationships among mammals, which of the following groups would be most closely related to the giraffe (Giraffa camelopardalis)?

Bears (Family Ursidae)

Elephants (Family Elephantidae)

Horses (Family Equidae)

Deer (Family Cervidae)

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Verified step by step guidance

Understand the concept of a cladogram: A cladogram is a diagram that shows evolutionary relationships among organisms based on shared derived characteristics. Organisms that share a more recent common ancestor are more closely related.

Identify the taxonomic relationships: Giraffes (Giraffa camelopardalis) belong to the family Giraffidae, which is closely related to the family Cervidae (deer) within the order Artiodactyla (even-toed ungulates). Both families share a more recent common ancestor compared to other groups listed.

Compare the evolutionary relationships: Bears (Family Ursidae) belong to the order Carnivora, which is evolutionarily distant from giraffes. Elephants (Family Elephantidae) belong to the order Proboscidea, which is also distant. Horses (Family Equidae) belong to the order Perissodactyla (odd-toed ungulates), which is less closely related to giraffes than deer.

Focus on shared characteristics: Giraffes and deer share similar anatomical and physiological traits, such as being ruminants (animals with a specialized stomach for fermenting plant material) and having even-toed hooves, which are indicative of their closer evolutionary relationship.

Conclude the relationship: Based on the shared derived traits and their placement within the order Artiodactyla, deer (Family Cervidae) are the most closely related group to giraffes (Family Giraffidae) among the options provided.