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 of the following statements best compares the two dominant lineages of modern angiosperms?

Monocots produce flowers with parts in multiples of four or five, while eudicots produce flowers with parts in multiples of three.

Both monocots and eudicots have two cotyledons and parallel leaf venation.

Eudicots have scattered vascular bundles in the stem, while monocots have vascular bundles arranged in a ring.

Monocots have a single cotyledon and parallel leaf venation, while eudicots have two cotyledons and net-like leaf venation.

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Verified step by step guidance

Step 1: Understand the key differences between monocots and eudicots, which are two major lineages of angiosperms. Monocots and eudicots differ in several structural and developmental characteristics.

Step 2: Focus on the cotyledons, which are the seed leaves present in the embryo. Monocots have a single cotyledon, while eudicots have two cotyledons. This is a fundamental distinction between the two groups.

Step 3: Examine the leaf venation patterns. Monocots typically exhibit parallel venation, where veins run parallel to each other. Eudicots, on the other hand, display net-like or reticulate venation, where veins form a branching network.

Step 4: Consider the arrangement of vascular bundles in the stem. Monocots have scattered vascular bundles, while eudicots have vascular bundles arranged in a ring. This structural difference is important for identifying the two groups.

Step 5: Review flower structure. Monocots produce flowers with parts in multiples of three, while eudicots produce flowers with parts in multiples of four or five. This characteristic can help differentiate between the two lineages.