Plant Cells and Organs. Plants that produce seeds are better suited for life on land. Seeds turn into seedlings and finally into adult trees. They are able to do this by undergoing mitosis and cell specialization
Plant Cells and Organs
Plants that produce seeds are better suited for life on land.
Seeds turn into seedlings and finally into adult trees.
They are able to do this by undergoing mitosis and cell specialization
Cell specialization = the process by which cells develop from similar cells into cells that have specific functions within a multicellular organism
The guard cells are the only cell in the epidermis that contain chloroplasts. They must therefore perform photosynthesis. It is the occurrence of photosynthesis that causes a stoma to open in the morning and close at night.
An Open Stoma
A Closed Stoma
Plant leaves appear green. Therefore, what colours must the chlorophyll pigments absorb? reflect?
CO2 + H2O -----> C6H12O6 + O2
The above equation shows us that photosynthesis is a process by which light energy is used to transform carbon dioxide and water into energy rich food molecules.
The Cohesion Tension Theory
Sources and Sinks
Source: the places where sugars are made. Since photosynthesis occurs in the leaves, this will be the place where sugars are loaded into the phloem
Sink: The plant parts that require carbohydrates. These are the places where the sugars are unloaded from the phloem