The answer is option one "true." Renewable resources are things that can be used repeatedly and can be replaced, which means it doesn't affect the environment. Renewable resources are like: Oxygen, water, wood, and paper all are are renewable sources. Nonrenewable sources are things that cannot be replace naturally which is because the formation of these sources takes millions even billions of years nonrenewable sources include: oil, coal, and some gases.
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Answer:
The correct option is 3. "At pH 6.5 the enyzme is 50% active"
Explanation:
For the titratable group to be protonated and cause the enzyme to be in the active state, it needs to have gained a hydrogen cation (H+). In order for that to happen, there must be enough hydrogen cations in the environment of the enzyme, and hence, an acidic pH is required in this case.
decreased primary consumer
The correct answer is C. The right side of the heart delivers deoxygenated blood (from vena cava) to the lungs (via pulmonary artery)
Actually, it is INNATE IMMUNITY. That is the proven right answer so be careful.