Natural selection is considered to be a fact and is backed by observable evidence. However, it is not considered to be the only driving factor... View Article
In biology, homology refers to the similarity of the structure, development or physiology of different species based on their descent from an... View Article
Bryophytes have a waxy cuticle that prevents the tissues from drying out. Additionally, some species of bryophytes also have their chlorophyll... View Article
Blood vessels aim to transport blood to and from the body. Veins bring blood back to the heart while arteries carry blood away from the heart.... View Article
B cells are activated when an antigen binds to the receptors on its cell surface. This causes the cell to start dividing and proliferating. ... View Article
Angiosperms have special adaptations which help them reduce water loss. For instance, the Brittlebush (Encelia farinosa) has silvery white leaves... View Article
Since algae are autotrophs, they can grow in virtually any environment that has adequate sunlight, carbon dioxide, minerals and water. ... View Article
In a nutshell, digestion comprises 2 phases - mechanical digestion and chemical digestion. Mechanical digestion is where chucks of food are... View Article
Recent research has suggested that the endomembrane system formed from the out membrane vesicles secreted by the endosymbiotic mitochondria.... View Article
Linnaeus developed a system that encompasses 3 kingdoms - namely plants (Regnum Vegetabile), animals (Regnum Animale) and minerals (Regnum... View Article
According to researchers at the Prion Biology Laboratory at the Scuola Internazionale Superiore di Studi Avanzati, healthy proteins look like... View Article
Prions are nonliving entities that lack nucleic acids such as DNA and RNA. They are believed to be formed when PrP associates with a foreign... View Article
Prions do not contain nucleic acids - which means they are technically not living organisms. Hence, conventional methods of sterilization become... View Article
When prions infect a healthy cell, it induces the healthy proteins to misfold and convert into the disease-associated prion form. This newly... View Article
Prions that cause scrapie in sheep have been known to remain dormant for several years in the ground. Hence, there is a possibility of animals... View Article
Normal proteins become prions when they fold abnormally. In the brain, these fault proteins form clumps, which can impair memory and movement. It... View Article
One of the reasons why we can consider nematodes to be evolutionarily more advanced than Platyhelminthes is their body cavity. Nematodes are... View Article
Arthropods are organisms that have an exoskeleton, paired jointed appendages and a segmented body. Members are distributed across a wide range of... View Article
