(1 point).
Which is true about ecosystems?
A. Biotic and abiotic factors are the same in most ecosystems.
B. Once defined, and ecosystem is a unit scientists can analyze.
C. All ecosystems are identical.
D. All ecosystems are the same size.

Question

(1 point).
Which is true about ecosystems?
A. Biotic and abiotic factors are the same in most ecosystems.
B. Once defined, and ecosystem is a unit scientists can analyze.
C. All ecosystems are identical.
D. All ecosystems are the same size.

rushwr · Answer

It should be B. 
A is wrong because biotic factors can't be abiotic at the same time. Biotic means living and abiotic means non- living 
C is wrong cuz no ecosystem is identical. Not a single thing is identical here. 
D ecosystems vary in their sizes at least by 1 centimeter. 
SO B is the answer :)