Give reason why reptiles are called crawling vertebrate​

What happened to rosalind franklin in 1956?

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

What will happen if two of the base pairs of the stand of the dna are switched