Age estimation of tree from rings
How the age of a tree can be calculated from the analysis of rings present on the cross section of its stem?
Expert
For growth of the tree it is essential to have the formation of new vessels inside the stem, a task which is performed by the vascular cambium. The vascular cambium is more active in the hot seasons (summer and spring) producing the lighter band formed of the large calibered vessels. During winter and fall the vascular cambium generates the opposite, so small calibered vessels and a darker band emerge outside the previous lighter band. Thus, two ring bands are formed yearly, one lighter and other darker. Through direct counting of these band pairs one may estimate how old the tree is.
Specify the type of cell division which enables sexual reproduction? What is meant by the gametogenesis?
What is the significance of mitosis for the embryonic growth?
Describe briefly the term vascular cambium? And also write down its function?
Write down the significance of–R group (or variable radical) in the amino acid molecule?
State the three main signs of diabetes?
Risk Occurrence and Impact:A) There are two elements that define risk in projects: the probability of an adverse event or occurrence the severity and cost of that event or outcome
Briefly describe the principle behind DNA fingerprinting?
Briefly describe the main reasons for Ozone hole?
What are the similarities and differences between the signaling arrays and responses that are driven and associated with the “Jasmontates” in plants, and the “eicosanoids”; arachidonic acid cascade components in animals? This is a large enough question th
Write down the nucleotides “portions” which bind in the formation of the nucleic acids? Give a brief description of the 5’ and 3’ extremities of the nucleic acids?
18,76,764
1932221 Asked
3,689
Active Tutors
1425925
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!