Which reproductive method is the only one available to mosses and ferns?

alternation of generation with both sexual and asexual reproduction

Explanation:

Both moss and fern belong to kingdom plantae. The gametophyte is dominant in moss and sporophyte in fern. The gametophyte produces games that fertilize forming an embryo. The embryo develops into a sporophyte that produces spores which then germinate forming a plant.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.