Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..
This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..
The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..
The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..
A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
