Ecology can best be described as the study of organisms, their environment and how the organisms interact with each other and the environment.
This is the answer
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The DNA molecule is composed of two strands with the help of hydrogen bonds which is doubl helix <span> At each end of the double helix, one strand is 5' and the other is 3'.the two strands are anti parallel so the correct option is
</span> They are oriented in opposite directions