Ascientist observes an enzyme polypeptide chain arrange in spiral turns that rise upaward and are held in place by hydrogen bonds. which level of structural arrangement is s/he looking for?

secondary structure (alpha helix)

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.