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- Question:- What would be the effect on flowering time of over-expressing VIN3 (i.e., 35S:VIN3) in a winter annual Arabidopsis plant grown adjacent to a summer annual wild type plant in long days under warm conditions? Assume that the plants germinate at the same time. In answering the question, describe the molecular mechanism that allows you to make this conclusion.Question:- Why do gametophytes not give rise to spores in bryophytes or ferns?EXPERIMENT 4: INDUCTION OF CALLUS SOMATIC EMBRYOGENESIS OF HAPLOID PLANTS Objective: To prepare anther as a source of explant To induce callus somatic embryogenesis of haploid plants Procedure: Cut off the buds and sort them into 3 developmental stages based on length of buds Surface sterilize the buds in 70% ethanol for 2-3 minutes, making sure the entire bud is immersed in the alcohol. Drain off excess alcohol from the buds and aseptically excise the anthers from each bud. Remove the filaments and culture the anther on one of the agar media provided. Label the stage of development of the bud on each petri dish as the anthers are cultured. Seal the Petri dishes with parafilm. Incubate in the dark at 26 to 28ºC for 4 to 8 weeks or until small plants can be seen growing out of the anthers. Then transfer to diffuse light. Record the results of the experiment in table form and submit the report. Observation: The culture was contaminated after 8 weeks of incubation…
- QUESTION 10 Which is true regarding plant reproduction? Self-pollination produces offspring genetically identical to the parent modified organs, such as corms and bulbs, are produced as a result of sexual reproduction cross-pollination allows plant populations to survive in unstable environments plants do not reproduce asexually vectors such as flies carry plant spores to new locationsINSTRUCTION: PLEASE ANSWER THIS QUESTION IN YOUR OWN WORDS NOT LONGER THAN 250 WORDS. Apples are sweet-tasting fruits that attract and are eaten by fruit-eating animals, which are agents for seed dispersal. How could you explain the fact that the seeds of such an attractive fruit contain cyanide-producing chemicals?Question:- Moderate heat treatment in grapevine increases the amount of antioxidant compounds. What are some examples of these antioxidants? What plant organ would this mechanism be useful to and why?
- Plant Physiology In the amazon rainforest, what is needed (1 only) to induce germination faster? Why?Question:- How has the size and longevity of the sporophyte and gametophyte changed with the evolution of plants?Question. What exactly is the significance of the branching points in the tree diagram above, and what exactly is this diagram supposed to show?
- GENETICS - Physical characteristics of heredity - Discuss the characteristics observed in ONION ROOT TIP in each mitotic phase.Question:- Explain how CO,-in dependence of light –regulates the transition to flowering. Include these transcription factors in your explanation: AP1, SOC1, CO, FT, LFY, FD.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”.
