Question

1. Answer any one of the following questions in about 40-60 words
প্রায় ৪০-৬০ টা শব্দৰ ভিতৰত তাৰ যিকোনাে এটা প্ৰশ্বৰ উত্তৰ লিখা ৪
Tapeworm and earthworm both have an elongated worm like, segmented body, yet they are
classified under separate phyla Give your answer with special reference to the segmentation of the
body and their excretory organs
(Ref Lesson-3)
(ক) ফিটাপেলু আৰু বেচু দুয়ােটাৰে দীঘলীয়া, পলুৰ দৰে খণ্ডিত দেহযুক্ত যদিও শ্রেণীবিভাজন কৰােতে দুয়ােটাকেই
বেলেগ বেলেগ পথতি অন্তভুক্ত কৰা হৈছে। সিহঁতৰ খণ্ডিত দেহ আৰু ৰেচনাংগৰ বিশেষ উদ্ধৃতিৰ সহায়ত তােমাৰ উত্তৰটো
লিজা। (৩ নং পাটো চোৱা)
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Answer 1

In biology, metamerism is the phenomenon of having a linear series of body segmentsfundamentally similar in structure, though not all such structures are entirely alike in any single life form because some of them perform special functions.[1] In animals, metameric segments are referred to as somites or metameres. In plants, they are referred to as metamers or, more concretely, phytomers.

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Answer 2

Answer:

The approach is to compare nucleic acid or protein sequences from different organisms using computer programs and estimate the evolutionary relationships based on the degree of homology between the sequences. ... In particular, the sequence of the small-subunit ribosomal RNA (rRNA) is widely used in molecular phylogeny.