Question

Determination of age of a tree by counting annual rings is
A. Dendrochronology
B. Dendrology
C. Countrochronology
D. Chronology
E. Demecology

Answer 1

Hint: The annual tree ring is a pattern that provides clues about climates of the past. A tree grows every year, a light ring is produced when new growth occurs to its trunk during the spring and early summer.

Complete step by step answer: The stems of dicotyledon plants growing in the temperate zone. As there are maximum seasonal variations observed therefore two types of secondary xylem produced by the vascular cambial rings and they are springwood or earlywood and autumn wood or latewood. Both of these secondary xylems associate together and build a ring of secondary xylems which is known as an annular ring. This annual ring is generated every year. The age of the trees can be calculated by the number of annual rings. This method is called dendrochronology.
Dendrochronology is the most useful technique to determine the appropriate age of samples. It is highly helpful especially in those samples which are too recent for radiocarbon dating. This method always shows a range rather than an exact date. A full sample to the edge is needed to calculate the appropriate date of the death of the tree, but in most cases, trimmed timber will not be the sample. Dendrochronology is also giving information about the timing of events and rates of change in the climate. This method is also applied to check-in radiocarbon dating to calibrate radiocarbon ages.
Dendrology is also known as forest dendrology or xylology. It is the study of the characteristics of trees, shrubs, lianas, and other woody plants. Dendrology is a branch of botany or forestry that is related to the taxonomy of woody species.
Chronology is the science where the events and revolution in plants are arranged in their order of occurrence in time.
Demecology is the study of human activities and social conditions in human populations.
Therefore, the correct option is option A.

Note: The cambium that presents in the region of secondary xylem is less active during the autumn and becomes more active during the spring. Two regions of secondary xylem are built every year. These two regions construct an annual or growth ring. With the help of these annular rings, the age of a plant can be calculated and the method is known as dendrochronology.