1. how is osmosis defined? a. as active transport b. as requiring a transport protein c. as an example of facilitated diffusion d. as diffusion of water through a selectively permeable membrane 2. which of the following describe the role a biochemical pump plays in active transport? choose all that apply a. it a cell accumulate a relatively high concentration of a molecule. b. it move materials across the membrane against the concentration gradient. c. it large molecules that do not normally cross the cell membrane to enter or exit cells. d. it move water more quickly across the membrane. 3. using your knowledge of osmosis, explain why you should not drink large quantities of ocean water by answering the following: 1) is ocean water hyper, hypo or isotonic to your body? explain why. 2) based on your answer to part 1, what will this type of solution ultimately do to the cells of your body? answer using 2 to 3 complete sentences. 4. the paramecium is a fresh water protozoan. the salt content of its cytoplasm is greater than that of the surrounding medium. using this information, answer the questions below: 1) does water tend to enter or leave the paramecium? is this process of passive or active transport? explain. 2) what process does the paramecium use to expel water? is this a process of passive or active transport? explain. answer in 2 to 3 sentences.

1.) D

2.) A,B

3.)  1) A saturated salt solution is definitely hyper tonic.

     2) Depending on the cell and the salt, there will be an isotonic concentration, where everything is balanced.

4) 1) Water tends to enter the Paramecium.

This is a process of passive transport.

This is a case of osmosis. In osmosis the SOLVENT travels from a region of low solute density to region of high solute density.

   2) Paramecium have what is called a contractile vacuole which contracts forcing water out to keep a stable osmotic pressure in the cell. Considering the vacuole would need to use energy is would be active either way

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.