Biological Sciences

Different Kinds of Leaves
Leaves can be categorized in several different ways, such as by edge, shape, or stem. The edge (also called the leaf's...
What is the difference between diffusion and osmosis?
When water dissolves another substance, it is because the polar water molecules and the solute attract one another. Each...
Plant Cell Model?
Where is the nucleus? Are ribosomes only found on the rough endoplasmic reticulum? You can make a biology lesson interactive...
What kinds of animals lay eggs?
Animals that lay eggs are known as oviparous animals and include fish, birds, reptiles and insects. These types of animals...
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