When two or more organisms cooperate, they work together toward a goal which benefits all of the cooperating organisms. cooperation can occur between organisms of different species or organisms within the same species.

which of the following is an example of cooperation among organisms?

a. a fly gets caught in a spider's web but escapes before being eaten.

b. a flatworm attaches itself to the gills of a crab to obtain bits of the crab's food.

c. two cows graze upon the same pasture.

d. army ants link themselves together to form a "bridge" so that their colony can cross a stream.

What are chlorofluorocarbons made of

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.