Exploration of Plants and Their Adaptations to Land

Flashcards covering key terms and concepts related to plant adaptations for life on land based on the lecture notes.

Eukaryotes

Organisms whose cells have a nucleus and organelles, including plants and algae.

Primary Endosymbiosis

The process by which a eukaryotic cell engulfs a cyanobacterium, leading to the formation of chloroplasts.

Archaeplastida

A supergroup of eukaryotes that includes red algae, green algae, and land plants, all of which can photosynthesize.

Phycoerythrin

A red pigment found in red algae that masks the green color of chlorophyll.

Apical Meristem

Regions of actively dividing cells at the tips of roots and shoots that enable plant growth.

Waxy Cuticle

A protective layer on the surface of plants that prevents water loss and desiccation.

Stomata

Small openings on the surface of leaves that allow for gas exchange, enabling oxygen and carbon dioxide movement.

Alternation of Generations

A reproductive cycle in plants involving a multicellular diploid sporophyte generation and a haploid gametophyte generation.

Xylem

Vascular tissue in plants responsible for transporting water and minerals from roots to the rest of the plant.

Phloem

Vascular tissue in plants that transports sugars and nutrients produced during photosynthesis.

Lignin

A complex organic polymer that provides structural support in plant cell walls, allowing plants to grow taller.

Desiccation

The process of drying out, which is a significant challenge for plants living on land.

Seedless Nonvascular Plants

Plants such as mosses and liverworts that do not have vascular tissue and reproduce via spores.

Seedless Vascular Plants

Plants such as ferns and horsetails that contain vascular tissue but do not produce seeds.

Economic Importance of Peat Moss

Peat moss is harvested for fuel and used in gardening; it plays a role in carbon storage and climate change.

Carboniferous Era

A period in Earth's history, approximately 300 million years ago, known for vast forests of seedless vascular plants, leading to coal formation.