Question

What substance do autotrophs produce that leads scientists to refer to them as "producers"?

A. oxygen gas <-- one of my top choices
B. glucose <-- heterotrophs do too though, right?
C. ATP <-- no, so do heterotrophs
D. nitrogen compounds <-- no
E. energy <--technically all organisms make energy, so no?

It's really down to A or B. I'm just not sure.

Answer 1

this link explains well , they make there own energy , but can make glucose and tun it into atp so I'm not sure what answer there looking for . technicaly energy isnt a substance

://uk.answers.yahoo.com/question/index?qid=20081117195316AAvNJjR

Answer 2

A. oxygen gas <-- one of my top choices (yes, they "split" water to for oxygen gas..)
B. glucose <-- heterotrophs do too though, right? (no one makes glucose EXCEPT photosynthetic organisms eg. plants, cyanobacteria, etc)
C. ATP <-- no, so do heterotrophs (heterotrophs "make" atp by ingesting glucose and processing it, but we need glucose)
D. nitrogen compounds <-- no (nope)
E. energy <--technically all organisms make energy, so no? (again, only photosynthetic organisms make their own energy by harnessing photons from the sun and turn carbon from CO2 into sugars, heterotrophs e.g.. humans, consume food and thus process it to make tap. once again we do not make energy)

Answer 3

ps the answer is glucose