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Plant Science
IB Biology HL Unit 17
49
Biology
12th Grade
02/06/2012

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Term
'low power' diagrams
Definition
Another term for plan diagrams
Term
net-like
Definition
The type of leaf venation in dicots
Term
parallel
Definition
The type of leaf venation in monocots
Term
one
Definition
# of cotyledons in monocots
Term
two
Definition
# of cotyledons in dicots
Term
multiples of 3
Definition
# of floral organs in monocots
Term
multiples of 4 or 5
Definition
# of floral organs in dicots
Term
fibrous, adventitious root
Definition
Type of root in monocots
Term
tap root with lateral branches
Definition
Type of root in dicots
Term
vascular bundles arranged in a ring
Definition
Describe the vascular system of dicots
Term
vascular bundles are scattered throughout the stem
Definition
Describe the vascular system of monocots
Term
the 1st leaf to emerge from a developing seed
Definition
What is a cotyledon?
Term
the part of the seed that becomes the root
Definition
What is a radicle?
Term
the protective layer over the shoot as it grows in the soil
Definition
What is the coleoptile?
Term
It has food and materials for the embryo
Definition
What is the function of the endosperm?
Term
-absorb water
-absorb minerals
-anchor the plant
Definition
What does the root system do?
Term
absorb light to make glucose
Definition
What do the leaves do?
Term
serve as a transport
Definition
What does the shoot system do?
Term
transport sugars
Definition
What does phloem do?
Term
transport water and minerals
Definition
What does xylem do?
Term
connects the blade to the shoot system
Definition
What does the peteole do?
Term
-becomes leaves
-grows laterally
Definition
What is the auxilary bud?
Term
-is at the end of the stem
-allows the plant to grow taller
Definition
What is the terminal bud?
Term
node
Definition
Where does the peteole meet with the stem?
Term
internode
Definition
What is the space between the nodes called?
Term
-embryonic stem cells
-can become either xylem or phloem cells
Definition
What is the cambium?
Term
structure and support
Definition
What is the function of ground tissue?
Term
transport
(xylem and phloem)
Definition
What is the function of the vascular tissue?
Term
cuticle
Definition
What is the waxy lipid layer on the leaf called?
(Hint: It keeps water in)
Term
-very dense towards the top of the leaf (palisade mesophyll layer)
-rounder, and more spread out on the bottom
Definition
Describe the leaf structure in terms of palisade mesophyll
Term
-gas exchange
-air spaces
Definition
What is the function of the spongy mesophyll?
Term
more on bottom:
-for less water loss
-to be closer to the spongy mesophyll
Definition
Describe the leaf structure in terms of stoma
Term
-central
-with xylem and phloem
Definition
Describe the leaf structure in terms of the vein
Term
-prop roots
-storage roots
-pneumatophores (air roots)
Definition
What are the plant organ modifications for the root?
Term
-provide extra support
-are above ground
-for top-heavy plants
Definition
Describe the functions of prop roots
Term
store carbohydrates
Definition
Describe the functions of storage roots
Term
-especially found in swampy areas and mangrove forests
-adaptation to anaerobic soil
-plants need more surface area for gas exchange
Definition
Describe the functions of pneumatophores
Term
-bulbs
-tubers
Definition
What are the plant organ modifications for the stem?
Term
tendrils
Definition
What is the plant organ modification for the leaves?
Term
-anchors plant for support
-provides more surface area for sunlight
Definition
Describe the functions of tendrils
Term
adds secondary dermal tissue
Definition
What does cork cambium do?
Term
adds secondary xylem and phloem
Definition
What does vascular cambium do?
Term
the source and location of stem cells
Definition
What is meristimatic tissue?
Term
-aka apical growth
-growing in length
Definition
What is primary growth?
Term
lateral growth
Definition
What is secondary growth?
Term
rhizome
Definition
What is another word for tuber?
Term
auxilary buds
Definition
What is another word for the 'eyes' found on potatoes?
Term
growth toward external stimuli
Definition
What is positive tropism?
Term
growth away from external stimuli
Definition
What is negative tropism?
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