(Help Please It Will Mean So Much!) Procedure: Using potatoes and salt water to take a look at transport across membranes. For the experiment shown, you are going to need to use a cork borer to drive away strips of potatoes and then nicely cut them accordingly, that many should to be the same length. Next you are going to get 6 beakers and every will have three strips of potatoes with a 1 to 5 g of salt and hundred mL water ratio (one beaker getting a 0:1 ratio, becoming the control). Then leave the potatoes for some time as well as measure once the time is actually up. You are going to record the dimensions as well as compute the percentage change for every strip. After, you're able to graph the results of yours to see the higher length of potato strips triggered by osmosis. In a well-structured paragraph, write an description of a controlled procedure for investigating the new aspect of transport across membranes you've proposed.

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Interpret the model. a three-part model with black right-arrows between the parts. left part: a large green apple-shaped component with a w-shaped indentation centered on top. a small blue apple-slice shape sits above the left indentation and an arrow points from the shape to the indentation. a small purple apple-slice shape and arrow sit above the right indentation and an arrow points from the shape to the indentation. middle part: a large green apple-shaped component with a square indentation centered on top. sitting in the left side of the indentation is a blue apple-slice shape with a flat bottom, fused to a purple apple-slice shape with a flat bottom on the right side of the indentation. right part: a large green apple-shaped component with a w-shaped indentation centered on top. an up-arrow is centered above the indentation pointing to a fused blue and purple apple-slice-shaped flat-bottom component sitting above the indentation. assigne "true" or "false" to the end of each statement. the model shows a shape change occurring in the enzyme after the substrate is bound in the active site. t/fthere are two products in this model. t? f there are three substrates in this model. t/f the model shows two different enzymes. t/f

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?