2009 A/L Biology classes by Dr Hiran Amarasekera Group Classes Group1 – Monday 12.00-2.00 pm (after July 2006: Monday 2.45-5.30 pm) Rotary Hall, Nugegoda (2820095) Group2– Wednesday 12.30-2.30 pm (after July 2006: Saturday 1.30-4.00 pm) Sakya, Nugegoda (Kohuwala) (2814908/ 2816882) Mass Class Sunday 10.30 – 12.30 (From August: Sunday 7.30 – 11.30) Commencement: 1 April […]
How old is this stem? You can determine the age by counting the annual rings of this wood stem. Check your answer here. This stem is three (3) years old, because we can count 3 annual rings. The most recently fromed annual ring is much narrower than the first two. Wood age
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