# Calculate what mass of plants (in g) a pair of starlings will retain from caterpillars when feeding 2 chicks to a mass

Calculate what mass of plants (in g) a pair of starlings will retain from caterpillars when feeding 2 chicks to a mass of 1.5 to 3 g each. If, according to the rule of the ecological pyramid, to increase 1 g of the mass of consumers of the 2nd order, 10 g of consumers of the 1st order are needed

Food chain: plants → caterpillars → chicks.
The chicks gained weight from 1.5 g to 3 g each, i.e. gain 1.5 g 2 = 3 g
According to the rule of the ecological pyramid: in order to grow 2 chicks, you need 3 · 10 = 30 g of caterpillars. These caterpillars would eat 30 x 10 = 300 g of plants. This means that a pair of starlings, feeding their chicks, will save 300 g of plants.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.