Which of the following best describes a species? a. an interacting group of populations that occupy the same area b. all of the individuals of the same population that inhabit an area c. a group of organisms that interact with nonliving parts of the environment d. a group of organisms that interbreed and have common characteristics

The correct answer is; D  

A group of organisms that interbreed and have common characteristics best describes a species .

A species is a group of organisms (plants or animals) that have similar characteristics (such as morphology and DNA sequence), and in which any two suitable sexes can interbreed to produce offspring (usually by sexual reproduction) that are also fertile.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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