What is the starting point of energy flow in the ecosystem, and what are the pathways

The starting point of the producer is fixed down with solar energy.

Pathways are channels: food chains and food webs.

Starting Point: Producer Stationary Solar, Pathway: Food Chain and Food Web, .

I don't understand that I think the starting point of energy in the system should be the solar energy fixed by the producer.

The way to do this is through photosynthesis.

The energy flow of an ecosystem refers to the process by which energy is transferred and dissipated within a system through a food network. The energy that is transferred and transformed between organisms and the environment in the form of transfer and convection is kinetic energy, including heat energy and light energy; The energy that is transferred and transformed between organisms through the food chain is potential energy. The energy flow of the ecosystem can be regarded as the process of transfer and transformation of kinetic energy and potential energy within the system, which is characterized by the following:

1) Producers (green plants) have a very low utilization rate of solar energy, only about 1%.

2) The energy flow is irreversible and unidirectional.

3) The energy in the flow is gradually reduced due to heat loss, and the energy consumed by the respiration of each trophic level is more than half of its total output, and the production volume of each level is at most only a small half of the total output.

4) The average energy utilization rate between consumers at all levels is 10%.

5) Only when the energy produced by the ecosystem is balanced with the energy consumed can the structure and function of the ecosystem maintain a dynamic equilibrium.

The structure and function of the ecosystem of the eight biologicals of Beijing Normal University - the material cycle is accompanied by the flow of energy.

The energy flow of the system is violently driven by the energy () flow foci of the ecosystem.

a.Bidirectional. b.Positive.

c.Unidirectional. d.Reverse.

Correct answer: c

Answer]: A, Posture Slag B, C, D

The energy flow of an ecosystem refers to the process by which energy is transferred and dissipated within a system through food chains and food webs. The energy flow processes of ecosystems include: the transformation of energy forms (from solar energy to chemical energy); transfer of energy (transfer of energy from plants to animals and microorganisms); The utilization of energy, that is, energy provides the need for the growth and reproduction of all kinds of organisms; Energy dissipation, that is, the respiration and excretion of organisms consume a part of the total energy (for example, the energy consumed by the respiration of organisms is about 50% of the primary production of biological jujubes).

Ecosystem energy flows are characterized by ().

a.The flow of energy is variable.

b.The flow of energy is one-way.

c.The quality of the energy gradually increases in the flow of energy.

d.The flow of energy within an ecosystem is a process of diminishing.

Correct Answer: The energy flow of the skeletal void is variable; The flow of energy is one-way; The mass of energy gradually increases in flow; The flow of energy within an ecosystem is a process of diminishing.

The source of energy in an ecosystem is sunlight, and the total amount of solar energy fixed by the producer is the total amount of energy flowing through the ecosystem, and this energy flows along the food chain, and the energy flow is characterized by unidirectional, decreasing, and non-cyclic energy transfer to the next trophic level with an efficiency of about 10 20 percent

So the answer is: the food chain; Reduce