Calculate the Molecular Formula for the Organic Compound Whose Quantitative

question 27

Multiple Choice

Calculate the molecular formula for the organic compound whose quantitative elemental analysis showed 48.6% caron and 8.1% hydrogen by weight.

• A) CH₂O
• B) C₂H₄O₂
• C) C₂H₆
• D) C₃H₆O
• E) C₃H₆O₂

Understand the distinction between open and closed circulatory systems and the concept of a hemocoel.

Describe the structure and functions of lophophores and their evolutionary significance.

Identify and explain the anatomical adaptations for movement and feeding in annelids.

Discuss the implications of having an anterior brain in protostomes and its evolutionary benefits.

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Definitions:

Hemoglobin

A protein in red blood cells responsible for transporting oxygen from the lungs to the rest of the body.

Oxygen

A chemical element with symbol O, essential for most life forms on earth, involved in respiration and energy production in cells.

Drain

To remove fluid, often from a body cavity, wound, or other source of accumulation, typically using a tube or other mechanism.