heartwood differ from sapwood in?
How parts of plants are useful in medicine?
What comprises the backbone or sidepieces of the DNA molecule?
What effect does dyhydromonoxide have on green vegetation?
Operon model in genetics refers to ?
Is cottonwood soft or hard?
What is Edaphic Factor ?
What is Weightlessness?
what is the process called where plants turn carbon dioxide co2 into oxygen o2?
Fungi lack chlorophyll,than why they considered evolutionary more advance than algae?
What is quiscent centre?
why do seeds have different color?
What is the difference between xylem and phloem?