SBI3U1 Unit 4: Plants

Basic needs of plants

Capture energy from the sun and photosynthesize, adjust position of leaves to maximize sun exposure, protect themselves by producing substances, communicate to other plant cells to respond to environmental changes, absorb nutrients through roots/mycorrhizal fungi, take in water, exchange gasses, reproduce

Phylogeny

Evolved from charophytes, a type of green algae 425-490 million years ago accounting for similarities between plants and green algae (protists), both contain chlorophyll, cellulose cell walls, and store carbs as starch

Dermal tissues definition

Two tissues types: Epidermis and periderm. Outermost cell layers, often have thicker walls and are covered with a waxy cuticle. In some plants, epidermis may eventually be replaced with periderm (like bark)

Dermal tissues functions

Protect against injury, herbivores, disease, and water loss. Facilitate gas exchange through pores in tissue

Ground tissue functions

Parenchyma

Type of ground tissue with thin walls which contain many chloroplast and large vacuoles. Forms most of t