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- Herbicides that act by promoting photorespiration are lethalto C3 plants but do not affect C4 plants. Why is this so?. Explain in your own words, how does CO2 affect C3 grassWhy are some plants called C4 plants and why are they important? How have they adapted to unfavorable climatic conditions? How do the activities of C4 plants compare with the activities of CAM plants?
- Plant defend themselves against caterpillar herbivory by producing a chemical called precocene which destroy the corpora allat. A) how would this chemical affect the development of insect. B) why would this be an effective defence mechanism for plant. C) would precoene be an effective chemical defence by plant if it was the adult stage insect and not the larva stage that fed on plant?The figure attached shows an open stoma during a gaseous exchange process in a plant. A) What is 'y'? B) Elaborate the gaseous exchange process in plants by considering the influence of 'y' on the turgidity of guard cells.Depending on the environment the plant is in, more or less gas may be produced. Suggest a method for measuring the rate of gas production from the aquatic plant in Model 1.
- Can you answer all the parts to this question please (a) What are the advantages of the self-incompatibility (SI) system in plants? Give at least three advantages. (b) What are the differences between gametophytic SI and sporophytic SI?Title: The effect of ethylene production on the unripe banana when are stored together with pear in a bag. Hypothesis: Ethylene is a plant hormone released as a gaseous state into the air by rapidly growing tissues and it affects the surrounding fruits. Iodine solutions bind to the starch of the plant by forming a dark complex. So the darker the fruit, the lesser the content of starch which means the fruit is unripe and vice versa. The lighter color of fruit represents a more ripening status of fruit. Variables. Independent variable: Concentration of ethylene. Dependent variable: Conversion of starch into sugar (ripening of fruit). QUESTION: DESCRIBE 2 CONTROL VARIABLES IN THIS EXPERIMENT: WHAT IS THE METHOD?Title: The effect of ethylene production on the unripe banana when are stored together with pear in a bag. Hypothesis: Ethylene is a plant hormone released as a gaseous state into the air by rapidly growing tissues and it affects the surrounding fruits. Iodine solutions bind to the starch of the plant by forming a dark complex. So the darker the fruit, the lesser the content of starch which means the fruit is unripe and vice versa. The lighter color of fruit represents a more ripening status of fruit. Variables. Independent variable: Concentration of ethylene Dependent variable: Conversion of starch into sugar (ripening of fruit). Control (describe at least 2): A total of 8 bags will be made, Bags 1-4 will be the control group and 5-8 will be the test group. Put 1 unripe pear in each of the control bags. Seal each bag and one unripe pear and 1 banana in each of the test bags and seal them. Place all the bags together and record the observations from the initial appearance to the…
- Tobacco leaves contain nicotine, a poisonous compoundthat is energetically expensive for the plant to make.What advantage might the plant gain by using some ofits resources to produce nicotine?Propose an explanation for the observation that the trees secretenectar only on young leaves and not on tougher, more matureleaves.Which type of plant secondary metabolite is best known for theantioxidant properties of human foods such as blueberries, tea, andgrape juice?a. alkaloids b. cannabinoids c. carotenoids d. phenolics e. terpenoids