What is catostrophism?

"the theory that changes in earth's crust during geological history have resulted chiefly from sudden violent and unusual events."

answer; i believe its (ovulation);

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.