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1) Complement System, Lymphatic System, and Circulatory System

2)Tonsils can stop germs entering the body through the mouth or the nose. Spleens filter your blood, destroying old and damage red blood cells.

3)Your skin is a waterproof barrier that secretes oil with bacteria-killing properties.

Explanation:

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.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.