10 Energy and biomass in food chains

Pregunta	Respuesta
What is the source of energy for most communities of living organisms?	Radiation from the sun
What do green plants and algae absorb?	The small amount of light that reaches them
Which energy transfers occur during photosynthesis? Where is this energy stored?	Light energy to chemical energy In the substances that make up the cells of the plants
Why is the mass of living material (biomass) at each stage in a food chain less that it was at the previous stage?	Some materials and energy are always lost in the organism's waste materials Respiration supplies all the energy needs for living processes, including movement. Much of this energy is eventually transformed to the surroundings
How can the biomass at each stage be drawn to scale?	Pyramid of biomass
How can the efficiency of food production be improved?	By reducing the number of stages in a food chain By restricting energy loss from food animals limiting their movement and by controlling the temperature of their surroundings
Are fish stocks in oceans rising or declining?	Declining
Why is it important to maintain fish stocks at a level where breeding continues?	Certain species may disappear altogether
What two things play important roles in the conservation of fish stocks?	Net size Fishing quotas

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	Creado por Anisha Rai hace más de 8 años