Biology Lecture on Land Plants and Protists

These flashcards cover key concepts related to the biology of land plants and their adaptations for life on land as discussed in the lecture.

Archaeplastida

A supergroup that includes mainly photosynthetic autotrophs, such as red algae and chlorophytes.

Shared Derived Characters

Unique features of plants that are not found in their ancestors, such as apical meristems and multicellular embryos.

Alternation of Generations

The life cycle of plants which involves alternating between multicellular haploid and diploid stages.

Haploid

The stage of an organism that has one set of chromosomes, represented as (n).

Diploid

The stage of an organism that has two sets of chromosomes, represented as (2n).

Sporangia

Structures in sporophytes that produce and protect spores.

Mutualism

A type of ecological relationship where both species benefit, such as zooxanthellae and coral polyps.

Apical Meristem

Localized regions of cell division found in the tips of roots and shoots of plants.

Multicellular Embryo

An embryo that is retained within the tissues of the female gametophyte.

Sporopollenin

A durable substance that protects spores, found in the walls of plant spores.