A-Level OCR Biology Unit 3 - Transport in plants Flashcards QUESTIONS AND ACCURATE ANSWERS

A-Level OCR Biology Unit 3 - Transport in plants
Flashcards QUESTIONS AND ACCURATE ANSWERS



Why do plants need a specialized transport system?
A

 to move products of photosynthesis, water, and oxygen around
from their place of origin
 most plants are large and so have to transport substances huge
distances from root to tip
 SA: vol is small in plants (even though for leaves SA:vol high)

2
Q
Define vascular system
A
a system of transport vessels in plants or animals
3
Q
Define herbaceous
A
having a fleshy/soft stem
4
Q
Define vascular bundle
A

, The vascular system of herbaceous dicots, made up of xylem and
phloem tissue
5
Q
Define dicotyledonous
A
plants that produce two seed leaves
6
Q
How do you tell if a plant is mono- or di- cotyledonous from its leaves?
A

 Monocots have vessels parallel to the leave

- Dicots have vessels which branch out from a central vessel
7
Q
What is the vascular bundle made up of?
A
Xylem and phloem tissue
8
Q
What are the products of photosynthesis?
A
Carbohydrates, proteins, lipids, nucleic acids
9
Q

, What are the products of photosynthesis known as collectively?
A
Organic compounds
10
Q
Why do plants need water? (5 reasons)
A

 to maintain turgidity of cells
 to transport nutrients around the plant
 to create an aqueous environment for reactions to occur
 to cool plants by evaporation
 for photosynthesis

11
Q
How is water transported in the plant?
A
Via the xylem
12
Q
From the inside to the outside what tissues are present in a dicot root
section?
A
xylem
phloem
pericycle
endodermis