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

27. Protists

Protist Life Cycles

General Biology

27. Protists

Protist Life Cycles

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1:25 minutes

Problem 5

Textbook Question

In a life cycle with alternation of generations, multicellular haploid forms alternate with
a. Unicellular haploid forms
b. Unicellular diploid forms
c. Multicellular haploid forms
d. Multicellular diploid forms

Verified step by step guidance

Understand the concept of alternation of generations: This is a reproductive cycle found in plants, algae, and some fungi, where there is a regular alternation between two distinct forms - one haploid and one diploid.

Identify the haploid and diploid stages: In alternation of generations, the haploid stage is known as the gametophyte, which produces gametes, and the diploid stage is known as the sporophyte, which produces spores.

Recognize the multicellular nature of these stages: Both the gametophyte and sporophyte stages are typically multicellular, meaning they consist of multiple cells working together.

Determine the correct alternation: Since the question asks about multicellular haploid forms alternating with another form, consider that the multicellular haploid gametophyte alternates with the multicellular diploid sporophyte.

Select the correct answer: Based on the understanding that multicellular haploid forms alternate with multicellular diploid forms, choose option d.

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Key Concepts

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

Alternation of Generations

Alternation of generations is a biological process in which an organism alternates between two distinct forms: a multicellular haploid phase (gametophyte) and a multicellular diploid phase (sporophyte). This cycle is common in plants, algae, and some fungi, allowing for genetic diversity through sexual reproduction.

Haploid and Diploid Forms

Haploid forms contain a single set of chromosomes (n), while diploid forms have two sets (2n). In the alternation of generations, the haploid gametophyte produces gametes, and the diploid sporophyte arises from the fusion of these gametes, leading to a new generation. Understanding these forms is crucial for grasping the life cycle dynamics.

Multicellular Organisms

Multicellular organisms consist of multiple cells that work together, often forming complex structures. In the context of alternation of generations, both the haploid and diploid phases are multicellular, with the gametophyte and sporophyte representing different stages of the organism's life cycle, each with distinct roles and functions.

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