BELL JAR EXPERIMENT    In the early 1770s, Joseph Priestley conducted a series of experiments that led to the discovery of the intimate relationship between plant and animal life.    In his principal experiment, Priestley placed a mouse within a sealed jar and observed it to eventually perish (a and b). When repeated with sprigs of mint within the jar, neither did the mouse die “nor was it at all inconvenient to a mouse” (c and d).   He had made the breakthrough that plants produce a substance which is life-giving to animals and then went on to describe it “dephlogisticated air”, which, thanks to the French chemist Antoine Lavoisier, soon became known as “oxygen”.

Subject: Environmental Physiology Please answer both parts of the question

Numbers 24-26

1. (i) List five response variables that should be determined in a callus induction experiment (ii) List five terms that describe texture of callus (iii) List five terms that describe colour of callus (iv) What is the sign of ethylene poisoning in a callus culture   (v) Provide three applications of cell suspension culture Sub-parts (iv) and (v) were not solved but the preceding sub-parts have already been solved

If you want to make a colorful chromatograph, which type of plant leaves would you use, pure green coleus leaves or variegated Coleus leaves, and why?

what is the response variable and explanatory variable for wrapping a banana in plastic wrap and leaving the other bananas alone to see which one rots faster in experimental study design?

(b) The carrot is an example of a storage organ Describe how you would carry out a test to show the presence of starch in this storage organ. [2] (c) Carrot plants produce storage organs in their first year. These are used in their second year to produce flowers and seeds Fig 2.2 shows three carrot seeds as seen under a light microscope. Fig. 2.2 You are going to calculate the magnification of Fig. 2.2. Measure the length of line ST drawn on one of the seeds in Fig. 2.2. length of ST mm The scale nule shows 10mm, divided into 100 divisions, each of 0.1 mm. Use the scale rule to measure the actual width of the seed marked by line ST actual width of seed, marked by ST (using scale rule). Calculate the magnification of Fig. 2.2. Show your working Give your answer to the nearest whole number mm CAMBR magnification Cambrid Engli econd

Please answer question 2

Previous research shows that shade-adapted plants produce more chlorophyll than sun-adapted plants produce. Previous research also shows that sun-adapted plants produce more of the key enzymes that catalyzes photosynthesis and cellular respiration than shade-adapted plants produce. Describe which experiments support each of these previous research findings. Cite your results from Procedure II and Procedure III to support your reasoning.

esis Experiment Pre x e/1FAlpQLSe1bU1Yeoh147E6rSOav9jF1elod7_gWmRI3SCcivqTgsOygQ/viewform?hr_submissi What do you think will happen to the amount of Carbon Dioxide in the bottl when the leaves are in the DARK? * Increasing function Decreasing function Constant functio (x) (x) f(x) (a) (b) (c) O The CO2 in the bottle will increase (a) O The CO2 in the bottle will decrease (b) The CO2 in the bottle will stay the same (c) Other: Explain why you are making this prediction, using what you know about photosynthesis and respiration.