(Science: botany) a change in the character of a cell wall, by which it becomes harder. It is supposed to be due to an incrustation of lignin. Origin: cf. F. Lignification. See lignify. The depositing of lignin in cell walls by plants that creates wood...
This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..
The hominid family diversified from the apes around 6 to 8 million years ago. Since then, the evolutionary path has prov..
The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..
This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..
Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..
Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..
