During the replication process, which enzyme(s) unwind(s) the double-stranded DNA? 1.) DNA ligase
2.) DNA polymerase
3.) DNA primase and helicase
4.) DNA gyrase and topoisomerase

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.

the answer is d. embryo

because photosynthesis could not occur (apex)