Wild foxes are aggressive and unfriendly toward humans. However, Russian scientists have worked since the 1950s to breed a domesticated version of the silver fox. Each year, the scientists choose the tamest foxes to mate together. Gradually, the foxes are becoming more like dogs. They are much more friendly and playful than wild foxes. What technique is used to increase desirable traits in domesticated animals through breeding

what school and grade?

not only is it colder, it also becomes darker, less salty, and more dense.

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 

synapse nervous system