Proteins
a. contain carbon, hydrogen, oxygen, and nitrogen.
b. consist of amino acids
c. are derived from fruits and vegetables
d. are part of antibodies

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.