Cells divide in an effort to reproduce and create more of themselves to keep their larger- encompassing species sustained.
On the planet earth. They exist in what we call the "world", which holds all seen life.
Lactose because it is a sugar made up of galactose and glucose.
Yes, it is possible.
In this case both of the parental plants were heterozygotes and they manifested dominant allele in their phenotype, which is round seed.
P: Aa x Aa
F5: AA, Aa, aA, aa - possible genotypes in fifth generations.
A- dominant allele (round seeds); a- recessive allele (wrinkled seeds)
Wrinkled phenotype is manifested only if there are two recessive alleles present.
Oxytocin. It apparently kick starts labour and causes contractions.