Which of these is an autotroph? consumer producer carnivore herbivore

Which statement names a chemical property of iron? a: it is dense b: it becomes rusted c: it’s hard to bend d: it has a melting point

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?