Case Study #1 – The Thanksgiving Relish Tray You have been asked to cut up carrots and celery to put on your Thanksgiving relish tray. You don’t want to be working right before dinner is served. You plan to cut them up ahead of time so that you can visit with friends and family. You were told by the expert cooks in your family to cut them up and put them in a bowl of ice water until it’s time to put them on the table. You are not to simply put them on the plate and put them in the refrigerator. Thinking about water movement across a cell membrane, answer the questions below. Be specific!

[2.1] What will happen to your carrot and celery sticks if they are sitting on the open plate?

[2.2] Explain what is happening to the cells in the carrot or celery sticks as they sit on the open plate?

[2.3] You have some carrots in your fridge that have been there a little too long. They are limp. As produce is expensive, and they are not moldy, is there anything you can do to revive them to a more edible condition? Explain!

Compare asexual reproduction to sexual reproduction

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.

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s