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- Which of these is caused by the effects of auxin? (choose all that apply) 1.Maintaining apical dominance 2.suppressing lateral bud growth 3. stimulating root growth in stem leaf buds 4.stimulating root elongation 5. preventing seed germination 6.phototropismBelow is a series of pictures of the stem (x.s.) of a corn, Zea mays. 40x (x.s.) 100x (x.s.) Make a sketch of both magnifications (40x and 100x) and upload it here with the following structures labeled: epidermis, sclerenchyma (fibers), ground tissue parenchyma, vascular bundles, phloem, xylem, sieve tube members, companion cells, vessel elements, tracheidsThe summer is not optimal for grape growing and you're searching in your memory for something regarding plant hormones. Explain 2 ways you could utilize plant hormones (choose from auxin, ethylene, cytokinin, gibberellin, abscisic acid, salicylic acid, jasonic acid) to compensate for a problem during growing. For each way:
- Determine the collective true-false status of the statements using the choices below. I. The vascular bundles of monocot stems are typically distributed all throughout the ground tissue.; II. The vascular bundles inside a typical eudicot stem are arranged in a characteristic ring.; III. Bulbs are stems that branch from the main stem of the plant and grow horizontally on the ground or just under it.; IV. Allium cepa is a plant with a bulb stem. Only two (2) statements are true. Only three (3) statements are true. Only one (1) statement is true. None of the statements is true. All statements are true.Positive phototropism is one of the most obvious aspects of plant growth but the mechanism behind it required considerable experimentation to finally explain. Briefly describe how positive phototropism works, including the processes, structures and/or molecules involved.(i) "One bad apple spoils the bunch". Explain this idiom in a scientific way and phytohormone behind this reaction. The same phytohormone is a necessary devil. Explain the positive contributions in terms of plant defense and fruit industries. (ii)
- Application of synthetic compounds could artificially modify the plant growth and development, i.e. inducing germination in dormant seeds, producing parthenocarpic fruits, promoting shoot initiation in tissue culture. Collectively, they are called ________________ which are synthetic compounds that imitate the organic naturally occurring substances that modify plant growth anddevelopment at low concentrations.Below is a series of pictures of monocot a leaf (x.s.), Zea mays. 40x (x.s.) Make a sketch of the 40x leaf cross section and upload it here with the following structures labeled: upper epidermis, bulliform cells (large cells on upper leaf surface), stomate, guard cells, mesophyll, xylem, phloem, bundle sheath cells, lower epidermis MacBook ProA study was conducted on the impact of phytohormones on medicinal stem explants.The stem explants were cultured onto MS media containingdifferent types of phytohormones as listed in Table below. Predict the resultsobtained after 4 weeks with justifications and conclude the results youpredicted
- What are the effects brought by cytokinin in plants? Explain the partnerships between cytokinin with auxin and hormone mentioned in Question 3 a). (i) (ii) Write an account on interactions between gibberellins, indole acetic acid and abscisic acid in plant growth promotion and seed germination.In plant physiology, What is leaf abscission and how is it controlled by the interaction between auxin and ethylene?Determine the collective true-false status of the statements using the choices below. I. After soil water crosses a root’s epidermis, it seeps into parenchyma that forms the root’s region of cortex until it reaches the vascular cylinder.; II. In a typical eudicot root, the vascular cylinder divides ground tissue into regions of pith and cortex.; III. By contrast, the vascular cylinder in a typical monocot root contains very little pith or none at all.; IV. Water and substances dissolved in it must pass through the endodermis of a root’s vascular cylinder before entering the xylem for distribution to the rest of the plant. Only two (2) statements are true. None of the statements is true. Only one (1) statement is true. Only three (3) statements are true. All statements are true.