Latin word for residue, i.e. that which is left over or remaining
Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..
This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..
Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..
This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..
The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..