Agrobacterium tumefaciens is a bacterium that causes crown gall disease in plants by transferring genetic material into plant cells. Scientists use it in genetic engineering and tissue culture to introduce useful genes into crop plants successfully.
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In the straight-leg jump, ankles, knees and hips remained stiff and less flexible. In the normal jump, knees and ankles bent naturally while hips flexed slightly, helping absorb shock, maintain balance and produce smoother, safer movement.
Phloem tissue would be affected by further trunk damage after debarking. Phloem transports food from leaves to other plant parts. Severe damage disrupts nutrient transport, weakening roots, stems and overall growth and survival of the tree.
Meristematic cells lack vacuoles because they divide continuously and need dense cytoplasm for active metabolism. Large vacuoles would occupy space and reduce the efficiency of rapid cell division required for plant growth and tissue formation.
In multicellular organisms, similar cells form tissues, tissues combine to form organs organs work together as organ systems and organ systems form an organism. This hierarchical organisation ensures proper coordination, efficient functioning and successful performance of complex life activities.