Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

1. A Review of General Chemistry

Intro to Organic Chemistry

Organic Chemistry

1. A Review of General Chemistry

Intro to Organic Chemistry

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Multiple Choice

What is the main difference between a food chain and a food web in ecological systems?

A food chain includes only producers and consumers, while a food web includes decomposers as well.

A food chain is a complex network of feeding relationships, while a food web is a simple linear sequence.

A food chain represents the energy flow in aquatic ecosystems, while a food web represents terrestrial ecosystems.

A food chain shows a single linear path of energy flow, while a food web shows multiple interconnected paths.

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Verified step by step guidance

Step 1: Begin by understanding the basic definitions of a food chain and a food web. A food chain is a linear sequence of organisms where nutrients and energy pass as one organism eats another. A food web, on the other hand, is a complex network of interconnected food chains within an ecosystem.

Step 2: Consider the structure of a food chain. It typically starts with a primary producer (like plants) and moves up to various consumers (herbivores, carnivores, etc.). This represents a single path of energy flow.

Step 3: Examine the structure of a food web. It includes multiple food chains and shows how they overlap and interconnect, illustrating the various paths through which energy and nutrients flow in an ecosystem.

Step 4: Reflect on the ecological significance. A food chain simplifies the energy flow by showing a direct line, while a food web provides a more comprehensive view of the ecosystem's complexity and the interdependence of organisms.

Step 5: Conclude by recognizing that the main difference is the complexity and interconnectedness in a food web compared to the simplicity and linearity of a food chain.