Humans, when exhaling release carbon which helps them to make sugar, and as a biproduct plants release oxegen which humans inhale.
Sugar is needed for scientists to grow plants
To feed nutrianse to the baby. whe the mother eats that goes to the umbilical cord and gives it nutriance
TT and Tt are possible genotypes of a tall pea plant as the resulting phenotype of both possible genotypes result in a tall pea plant.