601B

A grassland ecosystem and a pond ecosystem in pyramid of numbers shows

• Upright and inverted

• Inverted

• Upright

• Downright

At every successive trophic level in pyramid of energy, loss of energy is

• 90%

• 10%

• 50%

• 100%

Energy gets converted from a more concentrated to dispersed form.

• Ist law of thermodynamics

• 2nd law of themdynamics

• Energy flow in an ecosystem

• Law of thermodynamics

The most important feature of this energy flow

• Helps understand ecosystem

• Laws of thermodynamics

• Bidirectional

• Unidirectional

The whole sequence of communities which are transitory are known as

• Pioneer Community

• Primary succession

• Seres

• Secondary succession

Name the type of resource.

• renewable

• nonrenewable

Land does not easily fit in

• Renewable

• Non-renewable

• Renewable and non-renwable

• Conventional

Renewable or Nonrenewable: Natural Gas

• nonrenewable

• renewable

Mesarch

• Starting on sand

• Starting in a dry area with little moisture.

• Starting in an area of adequate moisture

Which takes longer, primary or secondary succession?

• Primary Succession

• Secondary Succession