First of all, what is the relationship existing between legumes and nitrogen-fixing bacteria? Is it parasitism, mutualism, commensalism, or facilitation?
Second, a pine forest floor would be a fine-grained environment for which of the following: nematodes, toads, herbaceous plants, insects, or bears?
Fire suppression by humans...
(a) will always result in an increase in the # of species in a biome
(b) can change a species composition with communities
(c) is necessary for the protection of endangered species
(d) will result in a sustainable production of increased amount of wood for human use.
All the choices for the last question sound like they're false but one of them's true. I don't think it's a or d though
Thanks
2007-01-20 05:40:57 · 3 answers · asked by ¡Jessica! 4 in Environment
1. mutualism
http://www.bios.niu.edu/meserve/bios316/lec15.pdf
2. Bears?
According to http://www.mansfield.ohio-state.edu/~sabedon/campbl50.htm
"A finely grained environment has patches which are so small that they may not be readily distinguished, and an "organism may not even behave as though patches exist," but what is fine-grained to one (typically larger) organism may by coarse-grained to another (typically smaller) organism."
3. B
2007-01-20 05:51:25 · answer #1 · answered by ecolink 7 · 1⤊ 0⤋
1. mutualism or symbiosis.
2.?
3. B i would think
2007-01-20 13:59:15 · answer #2 · answered by *dj's gurl* 2 · 0⤊ 0⤋
First one: Mutualism
Second: Not sure
Third: most likely B
2007-01-20 13:46:40 · answer #3 · answered by yuriman13 2 · 1⤊ 0⤋