Which statement about the difference between autotrophs and heterotrophs is true? autotrophs transform radiant energy into chemical energy, but heterotrophs can’t. autotrophs take in only oxygen, but heterotrophs take in both oxygen and carbon dioxide. autotrophs have two different electron transport systems, but heterotrophs have none. autotrophs don’t have a calvin cycle, but heterotrophs do.

A) Autotrophs transform radiant energy into chemical energy, but heterotrophs can’t.



Autotrophs are producers and can produce their own food, usually using sunlight. Heterotrophs cannot produce their own food and depend on autotrophs for food. 

Since sunlight is a form of radiant energy, and autotrophs use sunlight to make food (which is/can be chemical energy), the first choice is true.

The second choice is not true because autotrophs use carbon dioxide to produce food. The third choice is not true because some heterotrophs use an electron transport system in their mitochondria to generate ATP. The fourth choice is not true because the Calvin cycle is a step of photosynthesis, which is a process used by autotrophs, so they must have a Calvin cycle.

Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.