Anthropologists have dismiss the notion of clearly bounded, racially distinct populations of humans. a. true b. false

True

Explanation:

There are several prejudices existing in this society on the basis of color of an individual. Anthropologist have always stated that there is no biological relevance to such a system. There are no natural trait or characteristics which are depended on the race of a human being.  Characteristics like intelligence, height, blood group etc. with the color of an individual.  

Through their continuous efforts, Anthropologist have been able to discard the human racial biology.  

Hence, the given statement is true.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg