Which three scientists directly contributed evidence for the discovery of the role of dna

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.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

the growth of the plants is affected by the heat of the light. what is the student doing?