Question

Standing state means
(a) Amount of biomass per unit area.
(b) Energy is trapped by producers.
(c) Amount of energy produced by consumers.
(d) Quantity of solar energy.

Answer 1

Hint: This is the total quantity or weight of all the living organisms such as plants, animals, and microorganisms too, present in an area at a given time.

Complete answer:
The standing amount is the amount of biomass produced by living organisms per unit area in a given time and biomass is regarded as the natural mass of organisms in situ that is in the form the organism exists naturally.
 For example, in a salmon fishery, the biomass of the fishery might be regarded as the total wet weight the salmon would have if they were taken out of the water.
The mass can be expressed as the average mass per unit area. It is the number of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc. present in the soil at any given time.
Biomass can be measured in terms of the dried organic mass, then in this situation, only ${ 30 }$% of the actual weight will be counted and the rest being water.
Another way to measure biomass is to consider only biological tissue count, and teeth, bones, and shells are excluded. In some applications, biomass is measured only in terms of the mass of organically bound carbon that is present.

So, the correct answer is ‘Amount of biomass per unit’.

Note:
 -On Earth, the total live biomass is about 550–560 billion tonnes of carbon and the total annual primary production of biomass is just over 100 billion tonnes of carbon per year.
-The total live biomass of bacteria may be as much as that of plants and animals or much less than that.
-The total mass of DNA base pairs on Earth, as a possible approximation of global biodiversity, is estimated at 50 billion tonnes.