Intro Part 2- Structures: Unit 7

Question Answer
Name the 5 structures of a plant. 1) seeds
2) flowers
3) roots
4) stem
5) leaves
When do seeds develop? -they develop after the sperm and egg are fertilized
What are the 3 parts of a seed? 1) cotyledon
2) seed coat
3) young plant
Describe a cotyledon. -it is the seed leaf found inside the seed and it stores food
Explain monocot. -one cotyledon, the flower parts in threes, and it has leaves with parallel veins
Explain dicot. -two cotyledons, the flower parts in fours and fives, and it has leaves with branching veins
What is the purpose of the seed coat? -it surrounds and protects the seed
What is a young plant? -It is nourished by the stored food before photosynthesis
Explain the purpose of Flowers. – they assist in reproduction (pollination)
– they are used directly for food
Explain the functions of Roots. – they supply a plant with water and dissolved minerals
– they support and anchor the plant
– they store surplus food during photosynthesis
Name the 7 structures of Roots. 1) epidermis
2) root hairs
3) root cap
4) xylem
5) phloem
6) taproot
7) fibrous roots
Describe the epidermis. -it is the outermost layer of the root
Describe and tell the function of root hairs. -they are hairs that extend out of the
– they aid in water absorption
Describe the root cap. -it protects the tip of the roots
What does a root cap produce and why? – it produces a slimy substance to make it easier for root growth through the soil
Describe the xylem and what it supplies. – it is vascular tissue that is in the middle of the root
– it supplies the plant with water
Describe the phloem and what it supplies. – it is the vascular tissue around the xylem
– it supplies the plant with sugar
Describe the taproot. – it is the type of root that consists of one main root that grows downward.
Give 2 examples of taproots. – carrot
– dandelion
Describe fibrous roots. – the type of root that has many roots the same size that spread out from the base of the stem.
Explain the functions of the stem. – it supports the plant body
– it transports material around the plant
– some store materials
Name and describe 2 types of structures of stems. 1) The herbaceous stem is soft, thin and flexible
2) the woody stem is rigid (trees and shrubs)
What are the functions of leaves? – to make food for the plant
– for water storage
Name the 6 structures of leaves. HINT… Club Leaf 1) the cuticle
2) the epidermis
3) the palisade layer
4) the spongy layer
5) the stomata
6) the guard cells
Describe the cuticle. – the waxy layer that coats the surface of the stems and leaves
Describe the epidermis. – The thin, clear outermost layer of cells that covers roots, stems, leaves, and flower
– contains the stomata
Describe the palisade layer. – it contains the chloroplasts
Describe the spongy layer. – it allows gasses to travel
Describe the stomata. – It allows carbon dioxide to enter the leaf.
Describe the guard cells. – they open and close the stomata.