Which statement is not true of the mosses? a. The sporophyte...

Which statement is not true of the mosses? $a$. The sporophyte is dependent on the gametophyte. $b$. Sperm are produced in archegonia. $c .$ There are more species of mosses than of liverworts and hornworts combined. $d$. The sporophyte grows by apical cell division. e. Mosses are probably sister to the tracheophytes.

Which statement is not true of the mosses?
$a$. The sporophyte is dependent on the gametophyte.
$b$. Sperm are produced in archegonia.
$c .$ There are more species of mosses than of liverworts and hornworts combined.
$d$. The sporophyte grows by apical cell division.
e. Mosses are probably sister to the tracheophytes.

Key Concepts

Plant Phylogeny

Plant phylogeny involves the study of evolutionary relationships among different plant groups, including mosses and tracheophytes. Understanding these relationships helps in reconstructing the history of plant evolution and informs debates about which groups are more closely related to each other, a key concept when analyzing statements about sister group relationships.

Apical Cell Division

Apical cell division refers to the process by which cells at the growing tip, or apex, of a plant organ continuously divide. This mode of growth is crucial in the development of many plant structures, including the sporophyte in mosses, where the apical meristem drives elongation and formation of new tissues.

Archegonia

Archegonia are the female reproductive structures in mosses and other bryophytes. They are responsible for producing and housing the egg cells during sexual reproduction, thereby ensuring that fertilization can occur when sperm reach these protected structures.

Alternation of Generations

In the life cycle of land plants, including mosses, there is an alternation of generations where a haploid gametophyte produces gametes and a diploid sporophyte produces spores. This cycle is fundamental to understanding plant reproduction and developmental biology.

Mosses (Bryophytes)

Mosses are non-vascular plants that belong to the group known as bryophytes. They are characterized by their simple structure, reliance on moist environments, and a life cycle in which the gametophyte is the dominant phase, with the sporophyte remaining relatively small and dependent on it for nutrition.

Gametophyte and Sporophyte Relationship

In many bryophytes, the sporophyte is dependent on the gametophyte for its survival. This dependency means that while the sporophyte is essential for dispersing spores, it obtains nutrients from the gametophyte, highlighting a unique evolutionary strategy in non-vascular plants.

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