Lecture on Plants and the Conquest of Land

These flashcards cover key concepts related to the evolution and reproductive structures of land plants as discussed in the lecture.

Kingdom Plantae

A kingdom that consists of multicellular eukaryotic organisms that primarily live on land, evolved from green algal ancestors.

Multicellular eukaryotic organisms

Organisms with complex cellular structures composed of multiple cells, belonging to the domain Eukarya.

Embryophytes

Land plants that are distinguished by features such as dominant sporophyte generation and the presence of true roots, stems, and leaves.

Sporic life cycle

A life cycle that alternates between a multicellular haploid phase (gametophyte) and a multicellular diploid phase (sporophyte).

Gametangia

Special structures that protect developing gametes; includes antheridia (sperm-producing) and archegonia (egg-producing).

Plasmodesmata

Channels between plant cell walls that facilitate the transport and communication between cells.

Haploid (n)

The gametophyte generation, which produces gametes through mitosis.

Diploid (2n)

The sporophyte generation, which produces spores through meiosis.

Antheridia

Spherical or elongate gametangia that produce sperm in plants.

Archegonia

Flask-shaped gametangia that encloses an egg.