Which of the following is NOT a major component of soil?

a
.
mineral matter c
.
humus

b
.
air d
.
earthworms

answer; /// i believe the correct answer is (thrombocytopenia); (a)

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.

the answer is "a.) well–developed vascular system."

explanation:

the tricuspid valve is present between right atrium and right ventricle