Imagine being able to change one sentence in a massive instruction manual without rewriting the entire book. That is roughly what scientists try to do when they modify DNA through genetic engineering. DNA contains instructions that influence how cells grow, produce proteins, respond to signals, and perform other biological tasks. By changing a selected DNA … Read more
Biotechnology may sound like something found only in futuristic laboratories, but you probably interact with it every day. The bread on your table, the medicine in your cabinet, and some of the crops grown by farmers all involve biological processes used for practical purposes. So, what is biotechnology and how is it used? Biotechnology is … Read more
Plants cannot walk to a kitchen, order a meal, or hunt for food. Yet a tiny seed can grow into a huge tree, develop thousands of leaves, produce flowers, and store enough energy to create fruit. The process behind this impressive ability is photosynthesis. Plants capture energy from sunlight and use it to build energy-rich … Read more
Place a houseplant beside a pet, and the differences seem obvious. The animal can move around, search for food, and react quickly to sounds. The plant stays rooted in one spot, quietly growing toward the light. However, the biological differences go far beyond movement. Plants and animals are both living, multicellular eukaryotes. Their cells contain … Read more
A forest may look peaceful, but it is never truly still. Plants capture sunlight, insects eat leaves, birds hunt insects, fungi break down fallen wood, and nutrients move back into the soil. Thousands of interactions are happening at the same time. Together, these living organisms and their physical surroundings form an ecosystem. Ecosystems can be … Read more
A bee visiting a flower may look like a small everyday event. However, that single interaction connects pollination, plant reproduction, food production, insect behavior, weather, and the survival of many other species. Ecology is the branch of biology that studies connections like these. It explores how living organisms interact with one another and with nonliving … Read more
Picture a group of small birds living on an island. Some have thin beaks that are useful for eating soft seeds, while others have thicker beaks that can crack harder food. When a long drought leaves mostly tough seeds behind, birds with stronger beaks may have a better chance of finding enough food. If beak … Read more
Why do polar bears have thick fur, while desert animals are better equipped to handle extreme heat? Why are bacteria sometimes able to resist medicines that once killed them? The answer to both questions involves evolution. So, what is evolution and how does it work? In biology, evolution is the change in the inherited characteristics … Read more
A busy world exists on your skin, inside your digestive system, beneath the soil, and across every drop of natural water. Most of its inhabitants are so small that you cannot see them without a microscope. These tiny biological forms are known as microorganisms, or microbes. They include bacteria, archaea, fungi, protozoa, and microscopic algae. … Read more
An invisible world exists on your skin, inside your digestive system, in the soil beneath your feet, and even in the air you breathe. It is filled with organisms and biological agents that are usually too small to see without special equipment. Microbiology is the scientific field that explores this hidden world. It examines bacteria, … Read more