For the following question, write the word or phrase from the word bank to complete the sentences. (ecology and evolution), (“Tree of All Life”), (planets) , (molecules), (global ecology)(biotechnology), (genomics).

There are many fields of biology, and in some branches, biologists are concerned with tiny (1) , while others study whole (2) . Biologists who study how the activities of all living organisms affect both the atmosphere and climate are working in the field of (3) . Researchers who seek to replace damaged genes that cause inherited diseases or to genetically engineer bacteria are studying (4) . Some biologists work to combine the latest genetic information with computer technology to organize all living things into a single universal (5) "". Scientists concerned with HIV, bird flu, drug-resistant bacteria, and other pathogens are researching the (6) of infectious diseases. Scientists who look at the entire sets of DNA code contained in a wide range of organisms are studying (7) .

There are many fields of biology, and in some branches, biologists are concerned with tiny (1) molecules, while others study whole (2) planets. Biologists who study how the activities of all living organisms affect both the atmosphere and climate are working in the field of (3) global ecology. Researchers who seek to replace damaged genes that cause inherited diseases or to genetically engineer bacteria are studying (4) biotechnology. Some biologists work to combine the latest genetic information with computer technology to organize all living things into a single universal (5) "Tree of All Life". Scientists concerned with HIV, bird flu, drug-resistant bacteria, and other pathogens are researching the (6)  ecology and evolution of infectious diseases. Scientists who look at the entire sets of DNA code contained in a wide range of organisms are studying (7) genomics.

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!

easy

explanation: