In which portions of the upright test tube do Paramecium tend to aggregate. Explain. What is geotaxis? Are the Paramecium positively or negatively geotactic?
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- Which of the following statements are correct about nodule formation by Rhizobium species? P. Nodule formation requires participation of both plant's nodulin genes and rhizobial nodulation genes Q. Nod factors synthesized by nodulation genes are lipochitin oligosaccharides R. Infection thread forms during nodule formation is an internal tubular extension of the plasma membrane that is produced by the fusion of Golgi-derived membrane vesicles S. Nodule formation in non-leguminous plants is mainly mediated by Rhizobium species P and Q P. R and S F1 P, Q and R P, Q, R and S13. The diagram below is an illustration of growth pattern Mass in grammes Time in days (a) i) Name the type of growth represented by the curve shown abo ii) Give reasons for the steps of the curve between; P and Q At R1.is stachyose found in plant‘s seed or root？or leaf？ 2.Does stachyose present in human‘s milk？ 3. which type of plant （need specific name）can produce stachyose？ 4. which specific type （beneficial）bacteria love stachyose？
- 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?2. Balqees was all ready to observe the 3 slides but when she looked into the microscope she was surprised to see that only half of the view/ field is illuminated the other half is dark. What could be the probable cause? 3. After fixing the illumination issue Balqees thought of looking at the amoeba slide but she realized that she couldn't see the amoeba in the slide. List 3 possible mistake she is making?1. Label the following structures: For Hydrilla leaf cells, identify the semi-rigid cell wall, chloroplasts and cytoplasm. In potato tuber, label the parenchyma cells and for ripe tomato cells, locate the small orange or reddish chromoplasts in the cytoplasm. Name all the structures on the right side of the specimen. Make sure that the lines do not overlap. 2. Are the chromoplasts in ripe tomato similar in size and shape to Hydrilla leaf chloroplasts? If not, how do they differ? Write your observation under the micrograph of ripe tomato cells.
- 1. Distinguish morpho-anatomical features of nodules in legumes and non-leguminous plants.2. Give the different types of mycorrhizal associations and determine the importance of these associations to the host plant andto the fungi.The agent of gas gangrene is classified as an based on its oxygen sensitivity so in addition to antibiotics and debridement, hyperbaric oxygen is commonly used in the treatment of gas gangrene. This organism can persist in the outside environment under extreme harsh conditions which include the presence of high levels of atmospheric oxygen because it is able to form an which will germinate when introduced into environments such as deep muscle tissue with minimal levels of oxygen, lots of water, and lots of nutrients.2. In endospore germination, which of the following is/are used as carbon source? A) Calcium ions B) Dipicolinic acid C) SASPS D) SpoA
- What are 5 different examples of cold light in a bioluminescent bacteria/chemicals/etc.in a normal situation? What are 5 different examples of blue light in a bioluminescent bacteria/chemicals/etc.in a normal situation? How many photons of light emitted by a dinoflagellate per second in it's normal/usual environement and situation? How could the amount of photons of light produced by a dinoflagellate per second differ in an unusual environement and situation? Does it change at all?1. Describe the locomotion. 2. What is the difference between true motility and brownian movement? 3. What is Paramecium? 4. In what conditions do fungi grow? 5. What are dermatophytes? 6. What is budding?a. What is the reproductive potential of molds in terms of sporeproduction?b. How do mold spores differ from bacterial endospores?