How is the national wildlife refuge system similar to the pacific region coastal program?
a. both programs are concerned with providing habitats for wildlife.
b. both programs are primarily concerned with preserving fish species. c. both programs have set aside 150 million acres of land. d. both programs are under the u. s. fish and wildlife service.

The correct answer is option d, that is, both the programs are under the U.S. Fish and Wildlife Service.  

The National Wildlife Refuge refers to a system managed by the United States Fish and Wildlife Service. It is the framework of public waters and land set apart to preserve America's wildlife, fish, and plant species.  

On the other hand, the Pacific Islands Coastal Program refers to one of the local programs under the United States Fish and Wildlife Service coastal program. The program provides input and funding to restore an eight-acre coastal wetland on the Hawaii Island's Kona coast.  

The wetland offers nesting and feeding habitat for the four endangered species of waterbirds and numerous kinds of shorebirds and waterfowl.  

the answer is A

Explanation:

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!