When Woese began his classification efforts, he noticed that there were distinctions between some types of organisms that had been previously lumped together as bacteria because they were all prokaryotes. Uncovering the Third Domain Woese's groundbreaking research reshaped our understanding of the diversi...
were the first animals to evolve around 600 million years ago. Scientists theorize thatsponges arose from colonies of single-celled organismsthat eventually evolved into multicellular animals, with groups of cells evolving into specialized cell types. ...
Answer to: Some recessive mutations are lethal when homozygous. Why do you think that natural selection fails to remove those mutations from the...
What was the first animal to evolve? For biologists to call it an animal, an organism needs to be able to eat and must consist of multiple nucleus-containing cells that have specific functions. Sponges, filter-feeding organisms often anchored to rocks or the sea floor, were thefirst...
What was the first animal to evolve? For biologists to call it an animal, an organism needs to be able to eat and must consist of multiple nucleus-containing cells that have specific functions. Sponges, filter-feeding organisms often anchored to rocks or the sea floor, were the first animals...
Respect for life and environment: ability to value health and wellbeing and reflect on socio-scientific issues that may affect living organisms and the environment. Climate change resilience: ability to identify uncertain and unexpected needs caused by climate change and discuss how to respond to min...
We live in an age when all manner of scientific knowledge—from climate change to vaccinations—faces furious opposition. Some even have doubts about the moon landing.
biologists understand surprisingly little about the emergence of this process during evolution. It is not clear whether aging is inevitable, because there are organisms that seemingly do not age at all, moreover, the phenomenon known as negative aging, or rejuvenation, does exist: some turtles’ ...
Comparing DNA tells us about the evolution of our species. As life forms evolve, their DNA changes. Mutations, which occur when DNA replicates, cause these changes. A similarity can suggest a close relationship between two organisms, and can also tell us if two organisms share a common ...
What needs to be remembered about antibiotics is that they attack living, thriving organisms. Bacteria, like all lifeforms, struggle to survive, and evidence suggests that bacteria are among the earliest lifeforms. Clearly germs that can adapt and resist antibiotics have a better chance of perpetua...