Exam 1 Flashcards
Plant requirements…
CO2 (above ground, sunlight (above ground), water (below ground), and minerals (below ground)
Shoot system
Above ground, composed of stems and leaves
Root system
Below ground, composed of roots
Three basic plant organs…
Roots, stems, and leaves
Taproot system
A single taproot branching into smaller lateral roots (carrot)
Taproot system
A single taproot branching into smaller lateral roots (carrot)
Fibrous root system
Many slender roots extending from the stem
Root hairs
Increase the root’s surface area, allowing for more absorption
Evolutionary adaptions of roots
Pneumatophores (air roots), prop roots, buttress roots, storage roots, and “strangling” aerial roots
Nodes
The point on the stem where leaves are attached
Internodes
Long segments between nodes
Evolutionary adaptions of stems
Tubers (storage), rhizome, thorns, and stolons (like strawberry plants)
Blade
Flat part of a leaf
Petioles
A stalk that joins the leaf to a node
Evolutionary adaptions of leaves
Tendrils (support), flower petals, spines, bulb
Three types of plant tissue…
Dermal, vascular, and ground