Earthworms improve the of soil by mixing soil particles through their burrowing activity

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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.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms

measured, submerged.