What do you call the union of egg and sperm? menstruation
circumsion
ovulation
fertilization

Fertilization

Explanation:

Fertilization is the joining of gametes (egg and sperm) to form a zygote.

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.