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Which class of stone is classified as improved stone and used to make dies?

Which wax is supplied in strips and placed around the impression tray prior to pouring?

Figure 4 below depicts a cross section of leaf tissue in plants. What is Structure 2 in Figure 4?

Figure 5 below depicts a cross section of an organelle responsible for photosynthesis. What is Structure 5 in Figure 5?

If there are three test tubes: Test Tube A contains a snail submerged in water, Test Tube B contains an aquatic plant submerged in water, and Test Tube C contains a snail and an aquatic plant submerged in water. Let’s revisit Test Tube C. If Test Tube C contains both a plant submerged in water and a snail submerged in water, and you make the test tube airtight by connecting a CO2 probe to the test tube, with plenty of light, what will happen to the amount of CO2 in the test tube as time progresses?  

What process below would have the following processes: Prophase 1, Metaphase 1, Anaphase 1, Telophase 1, Prophase 2, Metaphase 2, Anaphase 2, Telophase 2.  

Figure 9 below depicts a part of mitosis. What is structure 1 in the image?

What products resulting from photosynthesis can be directly used in aerobic cellular respiration by the mitochondria in a plant cell?  

If there are three test tubes: Test Tube A contains a snail submerged in water, Test Tube B contains an aquatic plant submerged in water, and Test Tube C contains a snail and an aquatic plant submerged in water. If Test Tube B has only an aquatic plant submerged in water, and there is plenty of supplied sunlight, what process or processes will be occurring in Test Tube B as time progresses?  

What is structure 3 in Figure 7 called?