13. (02.04 MC) Which statement best describes the difference between primary and secondary succession? (4 points)

In primary succession, the pioneer community contains nutrient-poor soil, whereas in secondary succession, the pioneer community contains nutrient-rich soil.

In primary succession, the pioneer community changes relatively quickly, whereas in secondary succession, the pioneer community changes relatively slowly.

In primary succession, the pioneer community changes as a result of natural forces, whereas in secondary succession, the pioneer community changes as a result of human
actions.

In primary succession, there is a progression of growth that develops on newly formed land, whereas
disturbed by an event.
secondary succession, it is the redevelopment of a habitat that has been

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.  

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.

i hope this : )

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms