Plants Flashcards
What is the cell type of plants? (Plants)
- eukaryotic
What is the number of cells for plants? (Plants)
- multicellular
What is the metabolism of plants? (Plants)
- autotrophic
Do plants have a cell wall? (Plants)
- yes
What are non - vascular plants? (Examples) (Plants)
- they do NOT contain vascular tissue
Ex:
- moss
- liverwort
- hornwort
What are vascular plants? (Examples) (Plants)
- they contain vascular tissue
Ex:
- ferns
- coniferns
- flowering plants
What are seeded plants? (Examples) (Plants)
- they reproduce using seeds
Ex:
- pine tree
- tulips
What are seedless plants? (Examples) (Plants)
- produce spores to reproduce
Ex:
- fern
What are gymnosperms? (Examples) (Plants)
- means “naked seed”
- contain seeds that are exposed on the surface of cones
Ex:
- conifers
- pine
- fir
- spruce
- cedar
What are angiosperms? (Examples) (Plants)
- known as the flowering plants
- reproduce using flowers and their seeds are contained in a fruit
- 90% of all plants are angiosperms
Ex:
- roses
- grass
- non conifers
What are monocots? (Examples) (Plants)
- embryos with 1 cotyledon
Ex:
- corn
- onions
What are dicots? (Examples) (Plants)
- embryos with 2 cotyledon
Ex:
- maple trees
How many organ systems do vascular plants have? (What are they?) (Explain) (Plants)
2 organ systems:
- Root system:
BELOW - ground system
Roots:
- anchors the plant into the soil
- absorbs water / mineral nutrients
- 2 major root types: (TAPROOT - one main, thick root, FIBROUS ROOT - small branching roots) - Shoot system:
ABOVE - ground system
LEAVES:
- site for photosynthesis
- VERY diverse in shape, appearance, size and number
- often covered in a waxy substance called cuticle to prevent water loss
STEM:
- supports the plant above ground
- where leaves grow from
What are the plants tissues? (Plants)
- Meristem
- Dermal
- Ground
- Vascular
What is the meristem tissue? (Plants)
- undifferentiated cells from which all new cells are produced by mitosis (stem cells of the plant!)
What is the dermal tissue? (Explain epidermis) (Plants)
- outer covering of the plant which includes: (epidermis: single outer layer of cells to cover / protect the plant, periderm: multi - layers known as BARK to protect against illness / injury)
The epidermis may contain…
a) Guard cells:
- paired, bean - shaped cells
- they surround / control the size of a small opening called stoma
b) Trichomes:
- tiny growths on the surface of the epidermis
- *give stems / leaves the “fuzzy” appearance
- keep leaf surfaces cool and reduce evaporation
- can be used to repel consumers
c) Root hairs:
- tiny hair - like extensions on roots to increase surface area available for water / nutrient absorption
What is the ground tissue? (Plants)
- makes up MOST of the plant’s inside
- various functions: storage, support, photosynthesis, etc.
What is the vascular tissue? (Plants)
- internal system of tubes running lengthwise through the stem
- transport mechanism
What are the 2 types of vascular tissue? (Plants)
- Xylem: transports water / minerals from the roots to the leaves (1 direction = up)
- Phloem: transports nutrients (ie: sugars) to areas needed for growth / storage (2 directions)
What does the term “naked seed” refer to? (Plants)
- gymnosperms
What are roots? (3 main functions) (Plants)
- underground system of the plant
- roots serve 3 main functions: (absorption: take in water and dissolved minerals that are then transported to the rest of the plant support: anchor / support that plant
storage: store carbs produced by photosynthesis, as well as water the and other nutrients
What are the types of roots? (2 types) (Examples) (Plants)
- Taproot:
- thick central root with smaller branching roots (ex: carrots, dandelions, beets) - Fibrous:
- many small branching roots
- roots are all about the same size / grow from a central point (ex: green onions, grass)
What are the structure / function and roots? (Plants)
- the tip of the root is covered by the ROOT CAP, which is a protective covering for the meristem (stem cells).
- these cells produce a slimy substance to reduce friction as the root grows through soils, rocks, and other materials
- like the rest of the plant, the root is covered in a layer of DERMAL tissue. this consists of: (epidermis: single OUTER layer of cells to cover / protect the plant. root hairs: tiny hair-like extensions from the epidermis to increase SURFACE AREA available for water and nutrient absorption).
- the cortex is the inner layer of cells found between the epidermis and vascular tissue. Composed of GROUND TISSUE .
- the CENTRE of the root is made from VASCULAR TISSUE. (Xylem: moves water and minerals from the roots to the leaves 1 direction = UP. Phloem: moves nutrients to areas needed for growth or storage 2 directions.
*MONOCOTS roots: XYLEM cells form a RING and PHLOEM cells surround the xylem cells in the ring.
*DICOTS roots: XYLEM cells for an X or STAR shape and PHLOEM cells are between the arms of the X / star.
What are the types of meristems? (Plants)
- Apical meristem: region of cells that grow / divide in the tips of roots / stems to make the plant LONGER
- Lateral meristem: region of cells that grow / divide in the roots / stems to make the plant THICKER / WIDER