Why is it important for sewage treatment plants to remove nitrates and phosphates from sewage before discharging it into a river? Explain.
What will be an ideal response?
Nitrates and phosphates are plant nutrients that can cause algae blooms and overgrowth of other aquatic plants in the water. As the algae and other plants die, dissolved oxygen is depleted and aquatic organisms may die.
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Which of the following species interactions is(are) considered symbiotic?
A. competition B. predator/prey C. parasite/host D. mutualism E. Both C and D are correct.
Which of the following structures directly controls the pituitary?
What will be an ideal response?
What do inspiration and expiration have in common?
A. They both conduct air from the outside. B. They both involve air traveling in the same direction. C. They both use the same pathways. D. They both remove wastes from tissues. E. They both end in the lungs.
The function of nectar is
A. provision of carbohydrates for the plant. B. attraction of pollinators. C. a sticky trap for parasitic insects. D. prevention of desiccation. E. preservation of delicate flower parts.