B2 - Plant Organs Flashcards
Why is the stem needed?
To transport mineral ions, water and nutrients like sugar around the plant
Holds up the leaves towards the light
Why do leaves need to be in the light?
So that photosynthesis can happen in the leaves
Why do plants need photosynthesis?
To produce glucose which is food for the plant
What is epidermal tissue needed for?
A protective layer for plants
Why is epidermal tissue transparent?
It contains no chloroplasts
What is the cuticle?
A wax like substance on the surface of the leaf that prevents the leaf losing water
Why is the palisade layer needed?
To produce glucose using photosynthesis
What is the spongy mesophyll layer needed for?
To store carbon dioxide and water
What are stomata needed for?
Letting carbon dioxide and oxygen in and out of the leaf
What two types of tissue do plant veins have?
Xylem and phloem
What are xylem and phloem needed for?
They are tube-shaped and transport substances around the plant
What does xylem do specifically?
Carries water and nutrients from the roots to where they are needed
What does phloem do specifically?
Carries sucrose around the plant
What is sucrose?
The sugar that the leaves produce from the glucose from photosynthesis
Why are roots needed?
To anchor the plant into the ground
To give the plant water and mineral ions from the soil
