Phototropism as photo means light
eg: photosynthesis
Most things can't be explained or it hasn't been discovered yet. Science is all about asking questions and figuring out how things are the way they are.
<span>1. Alternation of generations
2. multicellular, dependent embryos
3. sporopollenin
4. multicellular gametangia
5.apical meristems</span>
The order in which rock layers occur I'm pretty sure it is anyways
<span>This would be an estimated average requirement, or EAR. This amount is considered what would be "average" for the predominant body type and person regarding the intake of a nutrient. This may be more or less than what will be later calculated as the recommended daily allowance for that nutrient.</span>
