Invertebrates are animals without a backbone or vertebral column. Vertebral column is made up of small bones called vertebrae. The scientific name assigned to all animals without backbones is invertebrate, meaning without vertebrae This course covers characteristics of invertebrates and classify them. distinguish between invertebrates and vertebrates. characteristics, classification, and life cycles of Protozoa Porifera … Read More


Microorganisms are microscopic organisms commonly known as microbes. They are present everywhere — even inside of our bodies. This diverse group of living organisms are too tiny to be seen without a microscope. Microorganism include bacteria, viruses, fungi, algae, archaea, protists, and protozoa. This course covers the following: Characteristics of microorganisms and classify them Characteristics, … Read More