Photosynthesis, flow of energy, Biodiversity Part 2

A student built an aquatic community by adding water plants, snails and small fish to a large jar filled with water. Which 2 choices represents the flow of energy in this jar?

• Sun ---> plants ---> fish

• Sun ---> plants ---> snails

• Fish ---> plants ---> Sun

• Fish ---> snails ---> plants ---> Sun

Which of the following statements best describe what is happening to the radiant energy from the Sun when it is being absorbed and used by plants during the process of photosynthesis?

• radiant energy is being converted into molecules of oxygen and glucose

• radiant energy is being stored as heat within the plant for cellular functions

• radiant energy is being transformed into stored chemical energy

• radiant energy is being recycled by the plant and returned to the atmosphere

Besides sunlight, which of the following are reactants of photosynthesis?

• hydrogen and carbon dioxide
• water and oxygen
• water and carbon dioxide
• hydrogen and oxygen

Ecosystems can be described in terms of feeding levels, or trophic levels. Which organisms are found in the trophic level containing the greatest amount of available energy?

• decomposers
• producers
• secondary consumers
• primary consumers

Which of the following best describes the energy transformation during photosynthesis?

• Chemical energy transforms into radiant energy
• Chemical energy transforms into thermal energy
• Radiant energy transforms into chemical energy
• Radiant energy transforms into thermal energy

What do the arrows in a food web represent?

• that some organisms in an ecosystem are more important than others
• the direction of energy flow through organisms in an ecosystem
• the taxonomic relationships of organisms in an ecosystem
• A  the sequence of events in feeding relationships within an ecosystem  

Which organism in the diagram below is responsible for transforming radiant energy into chemical energy?

• The owl
• The plant
• The snake
• The grasshopper

Ecosystem A is a grassland with not many trees and little water. Ecosystem B is a pond surrounded by the forest. Which ecosystem do you think would be more Sustainable?

• Ecosystem A

• Ecosystem B

Which organism would be responsible for transforming radiant energy into chemical energy

• phytoplankton

• krill

• cod

• shark

As biodiversity increases, sustainability will ________________.

• increase

• decrease