A double helix is <span>a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule. or in other words a double spiral.</span>
Answer:
Spiders have 2 body segments. The front is called a cephalothorax or prosoma and the abdomen, also known as opisthosoma.
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<em>for deactivation of <u>lac represso</u><u>r , a lactose molecule is required that further result in transcription of RNA as a result enzymes are produced which break down lactose...</u></em>
