Give the term for the amount of living matter in a component population of a specific trophic level at a given time.

Give the term for the graph showing the pattern of growth of a population.

Give the term for the loss of some useful components of soil.

Give the term for the organic matter in the initial stage of decomposition.

Give the term for the scientific study of human population.

Give the term for the increase in the amount of a toxic substance in successive trophic levels of a food chain.

Give two examples of third trophic level organisms

Give a diagrammatic representation of trophic levels in an ecosystem.

Give the term for the number of deaths per 1,000 individuals of a population in a year under the existing conditions.

Write the formula for the amount of the heat produced in a resistor when current flows through it for time. Give three applications of heating effect of current.