To put that in perspective, the Earth is thought to be about 4.5 billion years old, which means these "rocks"—really ...

Cell division allows for growth and replacement of dead cells. Most multicellular organisms are made of different cell types that are specialised to carry out specific functions. Control and ...

For 24,000 years, tiny creatures lay dormant, entombed in the frozen depths of Siberia’s permafrost. These microscopic ...

A balanced diet is described as the necessary amounts of the seven food groups that make a person healthy. The food groups and their relative amounts are given. Food packaging is looked at. Use ...

But as researchers have learned over the past 25 years since Doolittle’s work, there are many other ways that foreign DNA could end up inside eukaryotic cells, and these include the cells of ...

All multicellular creatures interact with bacteria, but some have taken the relationship to another level with highly specialized structures that house, feed, and exploit the tiny organisms. For the ...

Here we see just two examples, heart cells (far left) and nerve cells, or neurons. Altogether, multicellular organisms like humans have thousands of differentiated cells. Each is optimized for use ...

Each cell of the human body contains two meters of DNA. The whole secret lies in the intricate three-dimensional arrangement that allows DNA strands to be efficiently organized and compacted within ...