Which statement concerning ecological pyramids is incorrect? a) The pyramid of energy is the most accurate representation of energy flow in a food chain.

b) The pyramid of biomass does not take into account that not all substances have the same energy value.

c) The pyramid of numbers is the easiest to construct.

d) The pyramid of biomass is more representative of energy flow than the pyramid of numbers.

e) The pyramid of biomass is the most difficult to construct.

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

Suppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.