1. At which half of the petri dish are Paramecium most numerous? 2. What is phototaxis? Are the Paramecium negatively or positively phototactic? 3. Could this taxis be demonstrated with the tube in a vertical position? Explain.
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1. At which half of the petri dish are Paramecium most numerous?
2. What is phototaxis? Are the Paramecium negatively or positively phototactic?
3. Could this taxis be demonstrated with the tube in a vertical position? Explain.
Step by step
Solved in 3 steps
- 1. Distinguish taxis from a tropism. 2. What is thigmotaxis? Describe what happens when the Paramecium bumps against something. 3. What is chemotaxis? Does the acid solution cause a positive or negative response in the Paramecium?2. On Diagram 3, complete the following tasks. a) Draw how CO₂ gets into Diagram 3 the leaf. b) Draw how 0₂ gets out of the leaf. c) Label the name of the structure through which these gases pass. 2 What structure 10-119 Mesophyll Epidermal cells BOK Vascular bundle1. Differentiate erectophile from planophile plants. In relation to crop production, which plant will give greater benefit? Why?
- 1.To study mitosis, what is the best time to harvest onion root tips and why? 2. Other than an onion, can you suggest any other raw material for the study of mitosis. 3. For the cytological study, why are different parts of monocots preferred?1. Label the following structures of a Cross-section of a Monocot Stem in Primary Growth 2. Briefly describe or give the function of each structure identified(i) what are the juvinile hormoes that soluble in water. (ii) Explain the process of extraction of echinolone from echinacea plant (not about the cultivation and harvesting of echinacea) by using biological mechanisms. (iii) Is Echinolone water soluble. if yes, or No why.
- The image above shows a cross-section through a portion of the root of Phalaenopsis sp. stained with Toluidine Blue pH 4.4. Select the correct match to identify the items indicated. phloem tissue 1. 1 endodermis 2. 2 pericycle 3. 3 sieve tube 4. 4 passage cell 5. 5 6 6 xylem vessel 7. 7 xylem tissue 8. 8 companion cellThe 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.Write an account on discovery of gibberellins phytohormone. Inclusion of scientist's name, fungus, symptoms and functions in cell will be necessary. (i) Explain regulations of gibberellins, indole acetic acid and abscisic acid in plant growth region and seed germination respectively. (ii)
- Why do you think collechyma is not present in the root?KINDLY ANSWER THE FOLLOWING QUESTIONS: 1. Mention one subdiscipline of botany and discuss how it contributes to expanding our knowledge of plants and providing direct benefits to society. 2. What two membrane organelles are most likely abundant in the cutinized cell of the epidermis? Explain why.a. Choose four (4) characteristics best describe an Equisetum Wide and flattened achlorophyllous leaves Commonly found in damp and marsh environment Deep root system with rhizomes that produce many terrestrial stems. Photosynthetic stem Heterosporous, whereas microspore produce male and megaspore produce female gametes Strictly reproduce sexually Shoots are two types, fertile and sterile