What is the take-home message? a. Removing even a few lionfish helps native fish recover. b. Removing just a few lionfish does not help much; many of the invasive fish must be removed to help native fish recover. c. Removing even a great amount of lionfish does not help native fish recover. d. The biologists must find another way.

The question is incomplete. The complete question is as following:

Conservation biologists are scrambling to put measures in place to contain the spread of lionfish. For example, Stephanie Green and colleagues measured how quickly the number of native fish would recover if varying numbers of lionfish were removed from reefs in the Bahamas. They randomly assigned 24 reefs to one of four groups and plotted the proportional change in the number native fish at six-month intervals after different amounts of lionfish (0%, 25%, 75%, or 95%) were removed. (In the graph that follows, values above 1 on the y-axis represent amounts that exceed those at the start of the study in 2009, while values below 1 indicate declines.) Compare the percentage of native fish observed in June 2011 after 25 percent versus 95 percent of lionfish were removed. What is the take-home message?  

a.Removing even a few lionfish helps native fish recover.

b.Removing just a few lionfish does not help much; many of the invasive fish must be removed to help native fish recover.

c.Removing even a great amount of lionfish does not help native fish recover.

d.The biologists must find another way.

b.

Explanation:

The June 2011 green (top) data point indicates a proportional shift of about 1.7, which means that the native fish population shows very good recovery by about 70 per cent when 95 per cent of the lionfish were eliminated. By comparison, the orange (bottommost) data point at June 2011 indicates a relative shift of about 0.5, which means that when only a quarter of the lionfish were removed the native fish population decreased by about 50 percent (a result that was almost the same as when none of the lionfish were removed).

Hence, the correct option is B.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!