Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..
The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..
Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..
This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..
Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..
