Plant Tissues

What are stem cells in plants characterized by?

Stem cells in plants are undifferentiated cells that can specialize into different types of cells.

Define totipotent stem cells.

Totipotent stem cells can become any type of cell, such as a zygote.

What do pleuripotent stem cells specialize into?

Pleuripotent stem cells can become one of a specific subset of cells, like bone marrow cells.

Where are totipotent stem cells retained in plants?

Totipotent stem cells are retained in the apical meristem of plants.

What type of xylem do woody plants have?

Woody plants have lignified xylem, which consists of cell walls impregnated with lignin.

What are epidermal cell types in plants?

Epidermal cell types include guard cells, trichomes, and root hairs.

Describe the function of guard cells.

Guard cells regulate water loss from stomata.

What is the function of ground tissue in plants?

Ground tissue serves for storage, secretion, and support.

What type of cells make up parenchyma?

Parenchyma cells are the most abundant ground tissue cells and serve as filler.

What differentiates xylem from phloem?

Xylem moves water and is functional when dead, while phloem moves sugar and is functional when alive.

List characteristics of monocots.

Monocots have one cotyledon, parallel leaf variation, fibrous roots, flower petals in multiples of 3, and never have a woody stem.

List characteristics of dicots.

Dicots have two cotyledons, branched leaf variation, tap roots, flower petals in multiples of 4/5, and may have a woody stem.

What are the main layers of a leaf section?

The main layers include the cuticle, epidermis, palisade mesophyll, spongy mesophyll, and another epidermis.

What happens to guard cells when turgor pressure is high?

When turgor pressure is high, guard cells become turgid, allowing stomata to open.

What does it mean if a plant cell is flaccid?

If a plant cell is flaccid, it has low water pressure.