Posts Tagged ‘last question’

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

1) In Which community would organisms mostly likely have evolved to respond to different photoperiods?
a. coral reef
b. savanna
c. temperate forest
d. abyssal

2) Moving along altitudinal and latitudinal gradients, you’ll find the same sequence of biomes. There are equivalent changes along the gradient in which of the following except
a. temperature
b. humidity
c. vegetation
d. day length

3) Which would be most helpful in solving the world’s environmental problems?
a. increased agricultural productivity
b. increased life expectancy
c. more food from the oceans
d. decreased human birth rates
I don’t think it’s a or b but i’m not sure.

Last question: The pattern of dispersion for a certain species of kelp is clumped. The pattern for a species of snail living on the kelp would be…
a. absolute
b. clumped
c. homogenous
d. uniform
I think it’s d but I’m not sure.

Thanks