Mark the incorrect match
Primary productivity - Varies in different types of ecosystems
GPP - Available biomass for the consumption to herbivores
55 billion tons- Annual NPP of oceans
Secondary productivity- Rate of information of new oraganic matter by consumers
As discussed in Functions of Ecosystem: Productivity -
Gross primary productivity -
Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis. A considerable amount of GPP is utilised by plants in respiration.
Hence, the correct option is (b).