many people with early stage lyme disease develop a distinctive circular rash at the site of the tick bite usually around 3 to 30 days after being bitten this is known as erythema migrans the rash is often described as looking like a bull s eye on a dart boardany people with early stage lyme disease develop a distinctive circular rash at the site of the tick bite usually around 3 to 30 days after being bitten this is known as erythema migrans the rash is often described as looking like a bull s eye on a dart board
For example, giberellins stimulate cell division in shoot apical meristem, causing the plant to grow taller. These hormones also cause cell elongation in intercalary meristem of grasses. Cytokinin and auxin are also important growth regulators.ateral meristem is called the vascular cambium in many of the plants in which it is found. Secondary growth gives a plant added stability that allows for the plant to grow taller. Lastly, some plants have intercalary meristem.
On the basis of origin and development of initiating cells, meristems can be divided into three types: (i) Promeristem or priordial meristem: A group of young meristematic cells of a growing organ. It is the early embryonic meristem from which other advanced meristems are derived. In a plant, it occupies a small area at the tip of stem and root. It further divides to form primary meristem. (ii) Primary meristem: These are derived from promeristem. They are present below the promeristem at shoot and root apices. These cells divide and form permanent tissues. (iii) Secondary meristem: