4. Which of the following best describes the relationship between enzymes and substrates? Each enzyme can form many products from a specific set of substrates.
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Each enzyme is designed to work with substrates from all metabolic reactions.
Each enzyme can change the form of the substrates attached to it.
Each enzyme is designed to work with specific substrates for specific metabolic reactions.

why do you want to cheat? i dont take it, so i dont know.

explanation:

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answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

i think its both a and b