While Caffeine Is Actually a Toxic Substance, Estimate the Number

question 12

Multiple Choice

While caffeine is actually a toxic substance, estimate the number of cups of coffee required to deliver the LD₅₀ of caffeine to a human.

• A) 10 cups
• B) 30 cups
• C) 70 cups
• D) 130 cups
• E) None of the above

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Definitions:

Functional Diversity

The range and value of various functional roles performed by species within an ecosystem, contributing to its resilience, productivity, and stability.

Energy Flow

The transfer and transformation of energy through an ecosystem, from primary producers to various levels of consumers and decomposers.

Net Primary Productivity

The rate at which plants and other photosynthetic organisms produce organic compounds in an ecosystem minus the rate at which they use some of these compounds for cellular respiration.

Biomass

Organic material derived from living or recently living organisms, used as a source of energy or in various industrial processes.