RQ22- Innovations Plants
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Why was the evolution of cuticle so important during the evolution of land plants?
It drastically reduced rates of water loss on land.
What is the key structural difference between pores and stomata?
Pores are openings; stomata have guard cells that regulate opening and closing.
What is the function of vascular tissue?
structural support and water and sap transport
What unique structural feature is shared by tracheids and vessels?
They have a stiff secondary cell wall that is reinforced with the molecule called ligni
What is the key structural difference between tracheids and vessels?
Vessels
Why do many researchers refer to land plants as the embryophytes?
During early development, embryos are retained on the parent.
What is a pollen grain?
A structure containing cells that produce sperm, surrounded by a tough protective coat.
What is a seed?
A structure consisting of an embryo, a supply of nutrients, and a tough protective coat.
What is an angiosperm?
a flowering plant
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