Which is a weakness of traditional food webs when they are applied to complex ecological problems?
a) a food web does not represent all the links in an actual ecosystem. b) food webs do not account for non-native species in the enviornmentc) the many food chains of a food web make it too complicated to use. d) trophic levels are not taken into account when creating a food web.

Joe is breeding cockroaches in his dorm room. he finds that the average wing length in his population of cockroaches is 4 cm. he chooses the six cockroaches that have the largest wings; the average wing length among these selected cockroaches is 10 cm. joe interbreeds these selected cockroaches. from earlier studies, he knows that the narrow-sense heritability for wing length in his population of cockroaches is 0.6. a. calculate the selection differential and expected response to selection for wing length in these cockroaches. b. what should be the average wing length of the progeny of the selected cockroaches?

The procces of farming organism from the sea is ?

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere