In organisms that follow sexual reproduction, gametes combine to form the zygote, the first cell of a new organism. We will discuss the familiar case of humans, but the same applies to other organisms as well. The two gametes, sperm… Continue Reading
Mitosis is a type of cell division that results in two daughter cells that are identical to each other and their parent cell as well. Mitosis is an important process for many organisms since it serves different purposes. The zygote,… Continue Reading
Chromosomes, chromatin, nucleosomes, genes, alleles? What is the difference between these terms? What are their roles? And how are they organized inside each one of the small cells of an organism? When you hear these words, you might think that… Continue Reading
Have you ever wondered how the organs of an embryo develop inside the womb, how the immune system heals infections, or how a tree becomes taller with time? All of the organisms survive, grow, and reproduce by creating new cells.… Continue Reading
We learned in a previous post that in 1952, after a lot of experiments, DNA was accepted by the scientific community as the genetic material of the cells. However, something was still missing, and that was its structure. For many… Continue Reading
In a previous post, we learned that DNA is the genetic material of the cells, and one of its most important functions is that it contains genes that carry the information for the determination of the hereditary characteristics. However, scientists were… Continue Reading
DNA or Deoxyribonucleic acid is the genetic material of all the cells and most viruses, with the exception of some viruses that use another type of nucleic acid, called RNA or Ribonucleic acid. As we will see in the following… Continue Reading
Dinosaurs are a diverse group of reptiles that appeared about 250 million years ago at the beginning of the Triassic period and dominated the Earth during the Jurassic and the Cretaceous period. However, they suddenly vanished from the face of… Continue Reading
Do you use the words “crocodile” and “alligator” interchangeably? Do you think they are the same animals with a different name or with just a few differences? Let’s find out how to distinguish them. Crocodiles and Alligators are reptiles that… Continue Reading
Tuatara are reptiles belonging to the species Sphenodon punctatus. Biologists are very interested in this animal due to its uniqueness and history. Tuatara look like lizards, but they are much more different. They are the only surviving members of the order… Continue Reading