Answer: Generalist species are capable to survive in different environmental conditions and they are able to utilize various resources for example, a heterotroph with a varied diet. On the other hand specialist species can thrive only in few range of environmental conditions or has a limited diet. Most of the organisms do not come into either group.
The answer is B.
I look at it this way:
The bottom level of the pyramid contains the producers (the autotrophs),
the plants.
Next you have the herbivores (primary consumers), essentially. Mice and
the like.
Then there are the secondary consumers. Snakes.
Finally, there are the Tertiary consumers. Hawks.
Each level eats the level below it, to put it bluntly, but it cannot
keep all of that energy, so there must be some waste. For animals, the
waste product of living is heat (you give it off all the time).
Answer:
Subjects in the “normal” group had a normal amount of hydrogen, 20 ppm or less, and a normal amount of methane, 3 ppm or less. If subjects had greater amounts than the normal amount of hydrogen (≥20 ppm) detected but had less than the normal amount of methane (≤3 ppm), they were considered hydrogen positive (represented by the “Hydrogen Only” bar), while ≥3 ppm of methane detected but ≤20 ppm of hydrogen was considered methane positive (represented by the “Methane Only” bar). If subjects had greater than the normal amounts of both gases (≥20 ppm of hydrogen and ≥3 ppm), they were considered hydrogen and methane positive (represented by the “Methane and Hydrogen” bar).
i hope this helps