The answer should be 1.
Photosynthesis only occur when leaves are formed,
When is seed is produced, they already have a lot of nutrients inside stored until they grow leave to undergo photosynthesis.
Alot of poeple say they were made by aliens because of the way they are shaped but some say it because of the way they were build. it just depends on who you ask
B) Embryonic stem cells research requires the use of human embryos.