In an experiment, a scientist leaves a known amount of water in a beaker on a counter and captures all of the gas above the water. At several points during the next 10 days, the scientist measures the amount of water and gas, and calculates the number of molecules of each. The graph below shows the results. In the space below, answer the following questions. What process is occurring?
What is happening to the water molecules?
How does the total number of molecules change?

With the description of the different cell walls, membranes, and associated proteins set in the students' minds, you now need to introduce them to the idea that the cell wall can also act as a foundation to build things upon. bacterial appendages require a strong foundation that will offer the support needed to move and function in a dynamic world. for example, flagella are long, whiplike protein structures that are used by many gram-positive and gram-negative bacteria for locomotion. in order to function effectively, a flagellum must be firmly anchored to the cell wall. how will you be able to get across the idea that the peptidoglycan cell wall is strong enough to support such a mechanism? with a protein rod that passes through the cell wall and protein rings used to anchor it in the membranes, these basal bodies are the rudimentary biological motors that use atp power to spin the hook and the flagella attached to it. bacterial flagella have a biological motor that spins within the cell wall and is powered by atp. this allows the flagella to spin in a whiplike motion to propel the bacterium.

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates