German biologist Ernst Haeckel proposed the colonial theory of multicellular life in 1874. He suggested that ancestral metazoans or earlier animals originated from the symbiosis […]
Tag Archives: Biology
What is Multicellularity: Definition and Discussions
Single-celled organisms dominated life on Earth for billions of years. The evolution to multicellular life however changed the entire landscape because it resulted in the emergence […]
What is CRISPR? How CRISPR Gene Editing Works?
A 2014 MIT Technology Review article by A Regalado described CRISPR as “the biggest biotech discovery of the century.” This was not an overstretch. CRISPR […]
Host-Parasite Coevolution Theory of Sexual Reproduction
The host-parasite coevolution theory suggests that sex and sexual reproduction have evolved in part as a defense against parasites. It also suggests that the continued […]
Senescence 101: The Major Theories of Aging
What causes aging? Why do most species such as most animals and fungi age? Over the years, scientists have come up with different theories to […]
The Evolutionary Theories of Aging
There is a body of theories that collectively provide an explanation behind the causes and mechanisms of aging from an evolutionary perspective. These are called […]
Cytokine Storm: Definition, Causes, and Effects
A cytokine storm is a condition characterized by an uncontrolled and excessive release of inflammatory cytokines. More specifically, it is a physiological reaction observed in […]
Dexamethasone Explained: Pharmacology and Applications
The World Health Organization welcomed on 16 June 2020 the preliminary results of a clinical trial from the United Kingdom showcasing the usefulness of dexamethasone […]
How Does Remdesivir Work: An Explainer
Remdesivir is a broad-spectrum antiviral drug developed by United States-based pharmaceutical company Gilead Sciences initially against the hepatitis C virus and respiratory syncytial virus. Further […]
Symptoms of COVID-19: A Review of Studies
The signs and symptoms of COVID-19 vary from person to person. An exploratory study indexed on PubMed explained that the clinical spectrum of this disease […]