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The age of a tree can be determined more or less accurately by
একটি গাছের বয়স তুলনামূলকভাবে সঠিকভাবে নির্ধারণ করা যায়—
Practice MCQ for SSC, UPSC, RRB Exams
A. Counting the number of branches
A. শাখার সংখ্যা গণনা করে
B. Measuring the height of the tree
B. গাছের উচ্চতা মেপে
C. Counting the number of rings in the trunk
C. কাণ্ডের বলয়-এর সংখ্যা গণনা করে
D. Measuring the diameter of the trunk.
D. কাণ্ডের ব্যাস মেপে
Correct Answer: C
সঠিক উত্তর: C
Explanation
ব্যাখ্যা
The age of a tree can be estimated by a scientific method called
dendrochronology
.
In this method, the
number of annual growth rings
present in the trunk of a tree are counted.
Each
ring represents one year of growth
of the tree.
These rings are formed due to
seasonal variations
in growth during a year.
Thus, counting the rings in the trunk gives a
more or less accurate estimate of the tree’s age
.
Counting branches or measuring height and diameter does not give an accurate age of the tree.
Hence, the correct method is
counting the number of rings in the trunk
.
গাছের বয়স নির্ণয়ের একটি বৈজ্ঞানিক পদ্ধতিকে বলা হয়
ডেনড্রোক্রোনোলজি
।
এই পদ্ধতিতে গাছের কাণ্ডে থাকা
বার্ষিক বৃদ্ধির বলয় (রিং)
গোনা হয়।
প্রতিটি
বলয় একটি বছরের বৃদ্ধিকে নির্দেশ করে
।
এই বলয়গুলি তৈরি হয়
ঋতুগত পরিবর্তনের
কারণে।
অতএব, কাণ্ডের রিং-এর সংখ্যা গণনা করলে
গাছের বয়স তুলনামূলকভাবে সঠিকভাবে জানা যায়
।
শাখার সংখ্যা গণনা করা বা উচ্চতা ও ব্যাস মাপা দ্বারা গাছের সঠিক বয়স নির্ধারণ করা যায় না।
সুতরাং, সঠিক পদ্ধতি হলো
কাণ্ডের বলয় (রিং) গণনা করা
।
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