Why dose secondary succession occur faster than primary succession ?

Primary succession takes longer because soil needs to be created.

Explanation:

In secondary succession soil is already there present.

Secondary succession is usually faster than primary succession because soil and nutrients are already present because of 'normalization' by previous pioneer species, and because roots, seeds and other biotic organisms may still be present within the substrate.

Explanation:

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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