10. A biological community's productivity is a measure ofA. its number of species.B. the number of individuals in the community.C. available solar energy that can be converted to biomass.D. the amount of biomass produced in the community.E. All of these are combined in measuring a community's productivity

Biological community is the term that refers to all the living components that are there in an ecosystem. All the population living and interacting with each other in a particular geographic area makes up a biological community. Correct answer: The amount of biomass produced in the community. A biological community's productivity is a measure of the amount of biomass produced in the community. It is expressed as the mass per unit area or volume per unit time. It is a rate at which organic matter is created by the producers. Biomass is a organic matter present at a given time. The mass that is used after it got dry is known as dried mass and the mass of living matter is known as wet mass. Hence, the correct answer is option D.Incorrect options: a)its number of species, the measure of number of species is known as species richness. so, option a is incorrect. b)the number of individual in the community, the measure is population size.so, option b is incorrect. c)available solar energy that can be converted to biomass, it is a chemical energy for biosynthesis. so, option c is incorrect. e) this option is incorrect because, the community productivity is related to the biomass.